Killshot Fusion
Engineered. Integrated. Proven.
Killshot Fusion (Black Friday)
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Earn 5% store credit on every order.
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This sale version of the Killshot Fusion is set at a special price and allows 20 purchases at 10:10 AM each day, so act fast!
The Future of Throttle Body EFI is Here
Engineered Precision. Integrated Simplicity. Real-World Durability.
The Killshot Fusion is the next evolution in throttle body EFI systems. Building upon the success of the original Killshot, the Fusion takes everything users loved, robust hardware, accurate fuel delivery, and ease of tuning, and reimagines it with a fully integrated design that eliminates clutter, simplifies installation, and dramatically boosts reliability.
In a world where many EFI manufacturers rushed to integrate ECUs onto the throttle body and paid the price in failures, Aces EFI took a different path: more time, more engineering, and more testing. The result is Killshot Fusion, a true all-in-one TBI system that thrives where others fail.
Built from the Core Up – Smart, Strong, Stable
At the heart of the Killshot Fusion is a high-performance 32-bit automotive-grade microcontroller based on the PowerPC e200z0h core. This platform enables lightning-fast input/output processing, superior sensor management, and high-resolution fuel and spark control. Combined with Aces’ proprietary software and a proven B50 control chip, it delivers performance you can trust in any application, from street cruising to competitive racing.
Fusion also includes advanced ECC memory protection, a Memory Protection Unit (MPU), and a 4-layer PCB with a dedicated power plane. This design significantly reduces voltage fluctuations and impedance, ensuring system stability and durability, even in extreme environments.
Re-Engineered for the Harshest Realities
Many EFI systems fail because they ignore the reality of engine bay conditions, heat, vibration, electromagnetic interference (EMI), and moisture. The Killshot Fusion addresses each of these with purpose-built solutions:
- Potting-Protected ECU: The Fusion’s internal PCB is encapsulated in specialized potting material that insulates electronics from heat and shields against vibration, impact, and contamination.
- Dual Ignition MOSFET Drivers: Enhance ignition reliability by providing strong and stable spark energy under all conditions.
- Multi-Stage Filtering & Active Digital Shielding: Prevents noise interference from ignition systems and surrounding electronics, preserving signal clarity.
- EMI & Environmental Testing: The Fusion has passed extensive vibration, salt spray, and EMI validations, tests where competitor systems often fail. This isn’t just rugged, it’s refined, lab-proven durability.
Integrated Design, Maximum Simplicity
With the ECU and harness connectors integrated directly onto the throttle body, installation is faster, cleaner, and more reliable. There’s no need to mount an external ECU, route long harnesses, or deal with complex wiring. Just bolt it on, plug it in, and fire it up.
- Symmetrical Harness Layout: Connectors on both sides of the unit allow for clean cable routing no matter your engine bay configuration.
- Reduced Points of Failure: Fewer connectors and wires mean fewer potential problems down the road.
- No External ECU: Fewer boxes, fewer mounting brackets, and a dramatically cleaner engine bay appearance.
Advanced Software with Self-Learning Intelligence
Killshot Fusion’s control software doesn’t just respond to your engine, it learns it. Every second the system is running, it’s analyzing, adapting, and refining its control strategy for your unique build.
- Predictive Ignition Timing: Software anticipates and adjusts spark timing for optimal combustion under dynamic conditions to better meet timing targets.
- Accurate Injector Phasing: Improved synchronization between injectors enhances performance and fuel economy.
- Rapid Self-Learning: The ECU quickly adapts to your engine's fueling needs—no laptop required during setup.
- Anti-Interference Control: Predictive shielding algorithms mitigate signal disruptions before they occur.
Whether you’re adjusting idle quality or optimizing for boost, Fusion’s software is tuned to perform.
Performance Hardware – Loaded and Ready
- (4) 100 lb/hr Injectors – Supports up to 650 horsepower
- Integrated Coil Driver – For direct ignition control
- Step Retard – Built-in timing control for nitrous applications
- Boost-Ready – 3-bar TMAP sensor included for high-performance turbo or supercharged setups
- Built-in Sensors – MAP, TPS, IAT, and 4.9 Wideband O2 included
- Dual Fan Control – Optimize cooling strategy
- 5” Full-Color Touchscreen Handheld – Includes GPS speedometer, monitoring, and intuitive setup wizard
- Advanced Tuning Software – Free laptop-based tuning with pro-level tables and live data
- Fully Compatible – Works with Aces CAN accessories, digital dashes, and transmission controllers
Why Killshot Fusion? Why Aces EFI?
While others shipped flawed designs to meet a trend, Aces EFI held the line—refining, validating, and testing until we had a product worthy of our name. The Killshot Fusion is the culmination of five years of ECU and TBI development, engineered specifically for real-world performance and long-term reliability.
From weekend warriors to serious tuners, Killshot Fusion offers the confidence of clean installation, the control of pro-level tuning, and the backbone of proven engineering.
If you’re ready for a throttle body EFI system that does more than look the part, this is it.
All Onboard
650 hp
Supports up to 650 naturally-aspirated ponies
550 hp
Supports up to 550 boosted ones
Internal ECU
No room on the firewall? No problem. The Fusion's internal ECU makes for a much cleaner look under the hood. Read about our durability testing and R&D behind it here.
Minimal Wires
Designed for simplicity, the wire harness has only a few wires to connect:
- Main power
- Ground
- Key on power wire
- Fuel pump wire
- Distributor wire
Progressive Linkage
Improved throttle response on tip-in
Boost Reference Port
Better Ingredients. Better Performance.
Industrial-grade components? Never heard of her. Only automotive-grade components here. Aces only uses OEM-level components, which means better reliability and capbility.
Disco under the hood
We spent the last 5 years making sure our onboard ECU would hold up under the same conditions that plagued other companies. What better way to celebrate than with a mini rave?
If the shoe (throttle body) fits.
The Killshot Fusion uses the common 4150 style flange found on many classic engine manifolds, making it very versatile when it comes to compatibility. As long as the TBI unit fits, is within the appropriate HP range, and your engine uses a classic distributor, it's a match made in heaven...or the garage.
Product Info
Overview
This sale version of the Killshot Fusion is set at a special price and allows 20 purchases at 10:10 AM each day, so act fast!
The Future of Throttle Body EFI is Here
Engineered Precision. Integrated Simplicity. Real-World Durability.
The Killshot Fusion is the next evolution in throttle body EFI systems. Building upon the success of the original Killshot, the Fusion takes everything users loved, robust hardware, accurate fuel delivery, and ease of tuning, and reimagines it with a fully integrated design that eliminates clutter, simplifies installation, and dramatically boosts reliability.
In a world where many EFI manufacturers rushed to integrate ECUs onto the throttle body and paid the price in failures, Aces EFI took a different path: more time, more engineering, and more testing. The result is Killshot Fusion, a true all-in-one TBI system that thrives where others fail.
Built from the Core Up – Smart, Strong, Stable
At the heart of the Killshot Fusion is a high-performance 32-bit automotive-grade microcontroller based on the PowerPC e200z0h core. This platform enables lightning-fast input/output processing, superior sensor management, and high-resolution fuel and spark control. Combined with Aces’ proprietary software and a proven B50 control chip, it delivers performance you can trust in any application, from street cruising to competitive racing.
Fusion also includes advanced ECC memory protection, a Memory Protection Unit (MPU), and a 4-layer PCB with a dedicated power plane. This design significantly reduces voltage fluctuations and impedance, ensuring system stability and durability, even in extreme environments.
Re-Engineered for the Harshest Realities
Many EFI systems fail because they ignore the reality of engine bay conditions, heat, vibration, electromagnetic interference (EMI), and moisture. The Killshot Fusion addresses each of these with purpose-built solutions:
- Potting-Protected ECU: The Fusion’s internal PCB is encapsulated in specialized potting material that insulates electronics from heat and shields against vibration, impact, and contamination.
- Dual Ignition MOSFET Drivers: Enhance ignition reliability by providing strong and stable spark energy under all conditions.
- Multi-Stage Filtering & Active Digital Shielding: Prevents noise interference from ignition systems and surrounding electronics, preserving signal clarity.
- EMI & Environmental Testing: The Fusion has passed extensive vibration, salt spray, and EMI validations, tests where competitor systems often fail. This isn’t just rugged, it’s refined, lab-proven durability.
Integrated Design, Maximum Simplicity
With the ECU and harness connectors integrated directly onto the throttle body, installation is faster, cleaner, and more reliable. There’s no need to mount an external ECU, route long harnesses, or deal with complex wiring. Just bolt it on, plug it in, and fire it up.
- Symmetrical Harness Layout: Connectors on both sides of the unit allow for clean cable routing no matter your engine bay configuration.
- Reduced Points of Failure: Fewer connectors and wires mean fewer potential problems down the road.
- No External ECU: Fewer boxes, fewer mounting brackets, and a dramatically cleaner engine bay appearance.
Advanced Software with Self-Learning Intelligence
Killshot Fusion’s control software doesn’t just respond to your engine, it learns it. Every second the system is running, it’s analyzing, adapting, and refining its control strategy for your unique build.
- Predictive Ignition Timing: Software anticipates and adjusts spark timing for optimal combustion under dynamic conditions to better meet timing targets.
- Accurate Injector Phasing: Improved synchronization between injectors enhances performance and fuel economy.
- Rapid Self-Learning: The ECU quickly adapts to your engine's fueling needs—no laptop required during setup.
- Anti-Interference Control: Predictive shielding algorithms mitigate signal disruptions before they occur.
Whether you’re adjusting idle quality or optimizing for boost, Fusion’s software is tuned to perform.
Performance Hardware – Loaded and Ready
- (4) 100 lb/hr Injectors – Supports up to 650 horsepower
- Integrated Coil Driver – For direct ignition control
- Step Retard – Built-in timing control for nitrous applications
- Boost-Ready – 3-bar TMAP sensor included for high-performance turbo or supercharged setups
- Built-in Sensors – MAP, TPS, IAT, and 4.9 Wideband O2 included
- Dual Fan Control – Optimize cooling strategy
- 5” Full-Color Touchscreen Handheld – Includes GPS speedometer, monitoring, and intuitive setup wizard
- Advanced Tuning Software – Free laptop-based tuning with pro-level tables and live data
- Fully Compatible – Works with Aces CAN accessories, digital dashes, and transmission controllers
Why Killshot Fusion? Why Aces EFI?
While others shipped flawed designs to meet a trend, Aces EFI held the line—refining, validating, and testing until we had a product worthy of our name. The Killshot Fusion is the culmination of five years of ECU and TBI development, engineered specifically for real-world performance and long-term reliability.
From weekend warriors to serious tuners, Killshot Fusion offers the confidence of clean installation, the control of pro-level tuning, and the backbone of proven engineering.
If you’re ready for a throttle body EFI system that does more than look the part, this is it.
Specs
Killshot Fusion (Black Friday) Specifications
| Specification | Value |
|---|---|
| Accelerometer Support | No |
| Air Cleaner Diameter | 5" |
| Air Inlet Location | Center top |
| Basic Operating RPM Range | Up to 8,000 RPM |
| Boost Compatible | Yes |
| Boost Control | No |
| CAN-BUS Support | Yes (Aces) |
| Category | Electronic Fuel Injection |
| CFM | 1,000 |
| Coil Per Cylinder Ignition Support | No |
| Color | Black, Gold, or Polished |
| Datalogging Support | Yes |
| Distributor Included | Only in Top End & Master Kits |
| Dry Nitrous Compatibility | No |
| Dry Nitrous Control | No |
| E85 Support | Yes |
| EFI Type | Throttle Body Injection (TBI) |
| EGT Support | Yes (Aces) |
| Emission Code | 3 |
| Engine | Utilizes a 4150 style flange. Not specific to any one engine. |
| Finish | Powder coating for Black or Gold. Polished finish |
| Flange Style | 4150 |
| Forced Induction Support | Yes |
| Fuel Filter Included | Only in Fuel Kits & Master Kits. |
| Fuel Hose Included | Only in Fuel Kits & Master Kits. |
| Fuel Injectors Included | Yes. (4) 100 lb/hr injectors which are built in. |
| Fuel Pressure Regulator Included | Only in Fuel Kits & Master Kits. |
| Fuel PSI Required | 42-48 PSI. 60 PSI Max. |
| Fuel Pump Included | Only in Fuel Kits & Master Kits. |
| Fuel Rail(s) Included | Not applicable to TBI style systems. |
| Fuel System Type | Depends on selection and only in Fuel Kits & Master Kits. |
| Gasket Or Seal Included | Yes |
| Gasket Type | Fiber |
| Grade Type | Performance |
| Handheld Included | Yes |
| Handheld MCU Architecture | 64-bit |
| Idle Air Control Motor Included | Yes, built-in. |
| Ignition Timing Control | Yes |
| Ignition Type | CDI, magnetic, hall effect, or points style distributor. |
| Individual Cylinder Fuel Corrections | No |
| Injector Connector | EV1 (internal) |
| Injector Quantity | 4 |
| Injector Size | 100 lb/hr |
| Intake Manifold Included | No |
| Knock Retard Support | No |
| MAP Sensor | 3 Bar |
| MAP Sensor Included | Yes, built-in. |
| Material | Cast Aluminum (throttle body) |
| Maximum Horsepower Supported | 650 Naturally Aspirated |
| MCU Architechture | 32-bit ST56 Power PC |
| Minimum Horsepower Supported | 150 |
| Mounting Hardware Included | Yes |
| Multi-Stage Nitrous Control | No |
| Nitrous Bung(s) Included | No |
| Product Type | Electronic Fuel Injection System |
| Progressive Nitrous Control | No |
| Recommended Use | Stock to Mild applications for best results |
| Self-Learning | Yes |
| Sequential Injection | No |
| Single Or Dual Plane Type | Compatible with either |
| Throttle Body Bore Diameter | 42.8mm |
| Throttle Body Height | 3.46" |
| Throttle Body Included | Yes |
| Throttle Position Sensor Included | Yes, built-in |
| Transmission Control | Not included |
| WBO2 Sensor | 4.9 Wideband |
| WBO2 Sensor Included | Yes, one. |
| UPC | |
| User-Tuneable | Yes |
| Wet Nitrous Control | No |
| SKU |
What's Included?
Note: This list does not include any add-ons selected above.
Bluetooth Module Only
- USB-CAN Cable (x1)
- System Parts/Components / EFI Kit Accessories (x1)
- System Sensors and Small Electronics / Coolant Temperature Sensor (CTS) (x1)
- System Sensors and Small Electronics / WBO2 Sensor (x1)
- System Parts/Components / Killshot Fusion Black Throttle Body (x1)
- System Parts/Components / Killshot Fusion Ignition Coil Wire Harness (Coil A) (x1)
- Bluetooth CAN Module (x1)
- System Parts/Components / Killshot Fusion Ignition Coil Wire Harness (Coil B) (x1)
This sale version of the Killshot Fusion is set at a special price and allows 20 purchases at 10:10 AM each day, so act fast!
The Future of Throttle Body EFI is Here
Engineered Precision. Integrated Simplicity. Real-World Durability.
The Killshot Fusion is the next evolution in throttle body EFI systems. Building upon the success of the original Killshot, the Fusion takes everything users loved, robust hardware, accurate fuel delivery, and ease of tuning, and reimagines it with a fully integrated design that eliminates clutter, simplifies installation, and dramatically boosts reliability.
In a world where many EFI manufacturers rushed to integrate ECUs onto the throttle body and paid the price in failures, Aces EFI took a different path: more time, more engineering, and more testing. The result is Killshot Fusion, a true all-in-one TBI system that thrives where others fail.
Built from the Core Up – Smart, Strong, Stable
At the heart of the Killshot Fusion is a high-performance 32-bit automotive-grade microcontroller based on the PowerPC e200z0h core. This platform enables lightning-fast input/output processing, superior sensor management, and high-resolution fuel and spark control. Combined with Aces’ proprietary software and a proven B50 control chip, it delivers performance you can trust in any application, from street cruising to competitive racing.
Fusion also includes advanced ECC memory protection, a Memory Protection Unit (MPU), and a 4-layer PCB with a dedicated power plane. This design significantly reduces voltage fluctuations and impedance, ensuring system stability and durability, even in extreme environments.
Re-Engineered for the Harshest Realities
Many EFI systems fail because they ignore the reality of engine bay conditions, heat, vibration, electromagnetic interference (EMI), and moisture. The Killshot Fusion addresses each of these with purpose-built solutions:
- Potting-Protected ECU: The Fusion’s internal PCB is encapsulated in specialized potting material that insulates electronics from heat and shields against vibration, impact, and contamination.
- Dual Ignition MOSFET Drivers: Enhance ignition reliability by providing strong and stable spark energy under all conditions.
- Multi-Stage Filtering & Active Digital Shielding: Prevents noise interference from ignition systems and surrounding electronics, preserving signal clarity.
- EMI & Environmental Testing: The Fusion has passed extensive vibration, salt spray, and EMI validations, tests where competitor systems often fail. This isn’t just rugged, it’s refined, lab-proven durability.
Integrated Design, Maximum Simplicity
With the ECU and harness connectors integrated directly onto the throttle body, installation is faster, cleaner, and more reliable. There’s no need to mount an external ECU, route long harnesses, or deal with complex wiring. Just bolt it on, plug it in, and fire it up.
- Symmetrical Harness Layout: Connectors on both sides of the unit allow for clean cable routing no matter your engine bay configuration.
- Reduced Points of Failure: Fewer connectors and wires mean fewer potential problems down the road.
- No External ECU: Fewer boxes, fewer mounting brackets, and a dramatically cleaner engine bay appearance.
Advanced Software with Self-Learning Intelligence
Killshot Fusion’s control software doesn’t just respond to your engine, it learns it. Every second the system is running, it’s analyzing, adapting, and refining its control strategy for your unique build.
- Predictive Ignition Timing: Software anticipates and adjusts spark timing for optimal combustion under dynamic conditions to better meet timing targets.
- Accurate Injector Phasing: Improved synchronization between injectors enhances performance and fuel economy.
- Rapid Self-Learning: The ECU quickly adapts to your engine's fueling needs—no laptop required during setup.
- Anti-Interference Control: Predictive shielding algorithms mitigate signal disruptions before they occur.
Whether you’re adjusting idle quality or optimizing for boost, Fusion’s software is tuned to perform.
Performance Hardware – Loaded and Ready
- (4) 100 lb/hr Injectors – Supports up to 650 horsepower
- Integrated Coil Driver – For direct ignition control
- Step Retard – Built-in timing control for nitrous applications
- Boost-Ready – 3-bar TMAP sensor included for high-performance turbo or supercharged setups
- Built-in Sensors – MAP, TPS, IAT, and 4.9 Wideband O2 included
- Dual Fan Control – Optimize cooling strategy
- 5” Full-Color Touchscreen Handheld – Includes GPS speedometer, monitoring, and intuitive setup wizard
- Advanced Tuning Software – Free laptop-based tuning with pro-level tables and live data
- Fully Compatible – Works with Aces CAN accessories, digital dashes, and transmission controllers
Why Killshot Fusion? Why Aces EFI?
While others shipped flawed designs to meet a trend, Aces EFI held the line—refining, validating, and testing until we had a product worthy of our name. The Killshot Fusion is the culmination of five years of ECU and TBI development, engineered specifically for real-world performance and long-term reliability.
From weekend warriors to serious tuners, Killshot Fusion offers the confidence of clean installation, the control of pro-level tuning, and the backbone of proven engineering.
If you’re ready for a throttle body EFI system that does more than look the part, this is it.
Killshot Fusion (Black Friday) Specifications
| Specification | Value |
|---|---|
| Accelerometer Support | No |
| Air Cleaner Diameter | 5" |
| Air Inlet Location | Center top |
| Basic Operating RPM Range | Up to 8,000 RPM |
| Boost Compatible | Yes |
| Boost Control | No |
| CAN-BUS Support | Yes (Aces) |
| Category | Electronic Fuel Injection |
| CFM | 1,000 |
| Coil Per Cylinder Ignition Support | No |
| Color | Black, Gold, or Polished |
| Datalogging Support | Yes |
| Distributor Included | Only in Top End & Master Kits |
| Dry Nitrous Compatibility | No |
| Dry Nitrous Control | No |
| E85 Support | Yes |
| EFI Type | Throttle Body Injection (TBI) |
| EGT Support | Yes (Aces) |
| Emission Code | 3 |
| Engine | Utilizes a 4150 style flange. Not specific to any one engine. |
| Finish | Powder coating for Black or Gold. Polished finish |
| Flange Style | 4150 |
| Forced Induction Support | Yes |
| Fuel Filter Included | Only in Fuel Kits & Master Kits. |
| Fuel Hose Included | Only in Fuel Kits & Master Kits. |
| Fuel Injectors Included | Yes. (4) 100 lb/hr injectors which are built in. |
| Fuel Pressure Regulator Included | Only in Fuel Kits & Master Kits. |
| Fuel PSI Required | 42-48 PSI. 60 PSI Max. |
| Fuel Pump Included | Only in Fuel Kits & Master Kits. |
| Fuel Rail(s) Included | Not applicable to TBI style systems. |
| Fuel System Type | Depends on selection and only in Fuel Kits & Master Kits. |
| Gasket Or Seal Included | Yes |
| Gasket Type | Fiber |
| Grade Type | Performance |
| Handheld Included | Yes |
| Handheld MCU Architecture | 64-bit |
| Idle Air Control Motor Included | Yes, built-in. |
| Ignition Timing Control | Yes |
| Ignition Type | CDI, magnetic, hall effect, or points style distributor. |
| Individual Cylinder Fuel Corrections | No |
| Injector Connector | EV1 (internal) |
| Injector Quantity | 4 |
| Injector Size | 100 lb/hr |
| Intake Manifold Included | No |
| Knock Retard Support | No |
| MAP Sensor | 3 Bar |
| MAP Sensor Included | Yes, built-in. |
| Material | Cast Aluminum (throttle body) |
| Maximum Horsepower Supported | 650 Naturally Aspirated |
| MCU Architechture | 32-bit ST56 Power PC |
| Minimum Horsepower Supported | 150 |
| Mounting Hardware Included | Yes |
| Multi-Stage Nitrous Control | No |
| Nitrous Bung(s) Included | No |
| Product Type | Electronic Fuel Injection System |
| Progressive Nitrous Control | No |
| Recommended Use | Stock to Mild applications for best results |
| Self-Learning | Yes |
| Sequential Injection | No |
| Single Or Dual Plane Type | Compatible with either |
| Throttle Body Bore Diameter | 42.8mm |
| Throttle Body Height | 3.46" |
| Throttle Body Included | Yes |
| Throttle Position Sensor Included | Yes, built-in |
| Transmission Control | Not included |
| WBO2 Sensor | 4.9 Wideband |
| WBO2 Sensor Included | Yes, one. |
| UPC | |
| User-Tuneable | Yes |
| Wet Nitrous Control | No |
| SKU |
Note: This list does not include any add-ons selected above.
Bluetooth Module Only
- USB-CAN Cable (x1)
- System Parts/Components / EFI Kit Accessories (x1)
- System Sensors and Small Electronics / Coolant Temperature Sensor (CTS) (x1)
- System Sensors and Small Electronics / WBO2 Sensor (x1)
- System Parts/Components / Killshot Fusion Black Throttle Body (x1)
- System Parts/Components / Killshot Fusion Ignition Coil Wire Harness (Coil A) (x1)
- Bluetooth CAN Module (x1)
- System Parts/Components / Killshot Fusion Ignition Coil Wire Harness (Coil B) (x1)
Will it fit my engine?
Select your vehicle details to confirm compatibility.
Videos
Product Overview
Initial Adjustments
Using Advanced Tuning Software (optional)
Tech Tuesday Ep. 80
Answering all of your Killshot Fusion questions.
@acesfuelinjection
The Killshot Fusion on Joseph's Camaro
@acesfuelinjection
Killshot Fusion — The "Out of the Box" EFI System
@acesfuelinjection
Killshot Fusion: Kat's Firebird
Video Reviews
From the People
Justin Richardson
1932 Roadster @AcesFuelInjection Killshot Fusion
Proto-Tech LLC
Bryant Stilwell
Aces EFI Fusion! Throttle Body Comparison
Nomadic Dyno
@wasatchtruckfarm
Aces EFI killshot fusion 1967 c20 Chevy
Share what your customers are saying about your products, customer service or shipping rates.
Easy Install
*Not intended to be used in lieu of the manual*
Compare
What's the Difference?
Killshot Lite?
Killshot Fusion?
Killshot 2 Pro Max Plus Ultra Wideband 4K?????
See what makes each system unique below.
- External ECU
- Designed for stock 350s (or similar CID) using HEI-style Ignition under 450 hp (NA)
- Internal ECU
- Designed for stock-race builds under 650 hp (NA)
- External ECU
- Designed for stock-race builds under 650 hp (NA)
- Largest resolution tables (31x31)
- Dual quad compatible to support up to 1,200 hp
Designed to work with any classic 4, 6, or 8 cylinder engine that is under 650 hp, uses a 4150 style flange, and has a fuel system rated for EFI (43 PSI).
Designed to work with any classic 4, 6, or 8 cylinder engine that is under 650 hp, uses a 4150 style flange, and has a fuel system rated for EFI (43 PSI).
Designed to work with any classic 4, 6, or 8 cylinder engine that is under 650 hp, uses a 4150 style flange, and has a fuel system rated for EFI (43 PSI).
4150
4150
4150
65 lb/hr
100 lb/hr
100 lb/hr
Yes! This system only has basic custom tuning settings compared to other systems, as it is designed for stock engines primarily.
Yes! This works best for stock-mild builds and for anything beyond that, the system is fully tunable.
Yes! This works best for stock-mild builds and for anything beyond that, the system is fully tunable.
No. The Killshot Lite is designed for use with HEI style ignition setups which use mechanical advance.
Yes
Yes
External
Internal
External
No
Yes
Yes
HEI Style
- Canister Style
- Aces Brand
- Standard Aftermarket
- Aces Brand
- Standard Aftermarket
Bundle & Save!
Save 5% when you purchase a fuel, top-end, or master kit! See the 4 different kit types that we offer below.
Standalone
Includes the following:
- Throttle body
- ECU
- Handheld or Bluetooth Module
- Full Harness
- Sensors
- Accessories
Fuel Kit
Top End Kit
Master Kit
Any TBI Standalone Kit plus:
- Any Fuel Delivery System
- Any Distributor
- An AC2008 Ignition Coil
How do I set up and program my system?
Interface Options
Our EFI systems are self-learning for most stock-to-mild engine builds. You’ll use one of the included interface modules (depending on the option selected at purchase) to complete the initial setup and make adjustments on the fly. The startup wizard will prompt you with 6–12 setup questions, after which the self-learn feature takes over.
Additional fine-tuning may be required later, depending on your specific build.
Interface Option 1
Bluetooth Module
Compatible with Android and iOS* devices and plugs into the CAN connection on the main harness.
Android is available via download here, or in the Google Play Store Fall of 2025.
iOS is available Fall of 2025
Interface Option 2
5" Handheld (3rd Gen)
- Capacitive touch screen
- 64-bit processor
- 1920x1080 resolution
Interface Option 3
7" Handheld (2nd Gen)
- Capacitive touch screen
- 32-bit processor
- 1024x600 resolution
Most common questions
Quick answers to our most common queries for this product.
The Killshot Fusion is designed to work with any classic 4, 6, or 8 cylinder engine that is under 650 hp, uses a 4150 style flange, and has a fuel system rated for EFI (43 PSI).
The self learn will work for most stock-mild builds, while some mild and more advanced builds may require manual tuning.
The Killshot Fusion is designed to work with most stock or aftermarket ignition components. It will work with most tachometers and is compatible with Dakota Digital dashes using their Aces BIM Module (BIM-01-2-ACES).
Self-tuning is a common term used among aftermarket EFI companies, but we prefer the term "self-learning" as that is more accurate, even for our competitors who advertise "self-tuning."
Our systems are designed to self-learn the fuel MAPs and work best for stock-mild builds. Some mild builds and anything beyond that would require manual tuning, of which the system is fully capable. Additional features like nitrous and boost are also considered beyond stock and require manual adjustments to enable and configure these kinds of features.
Yes! You can make many changes using the Bluetooth or handheld interface, and we also offer a free PC app for more advanced tuning.
The Killshot Fusion can work with standard stock or aftermarket ignition components, but if you want to run timing control, it will need either a magnetic pickup distributor that has been locked out or a Hall Effect distributor. You will also need to make sure that your fuel delivery system can support 43-58 PSI. Whether or not you need a return line will depend on your fuel delivery system and if the regulator is inside or outside the tank. Whether or not you need to replace your tank will depend on which fuel delivery system you choose. We offer complete Master Kits for each EFI system that come with new ignition components and a fuel delivery system. You can visit the Killshot Fusion Master Kits page here.
Yes to both! The Killshot Fusion is compatible with both blow-through, draw-through, and nitrous applications and is also compatible with E85 Fuels. The Killshot Fusion's MAP sensor can be scaled for up to 26 lbs of boost and can be set to retard timing.
Note that for boost, the system is compatible, but cannot control the boost. You will need to use a separate controller for things such as wastegate control or solenoid activation. Use of these features will require manual tuning.
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