Adding a TBI system to a GM LS engine has been done for years, but the JACKPOT series GM LS TBI EFI makes the conversion easier than ever! The throttle body features 4 100 LB./HR. EV6 injectors and supports GM LS engines up to 650HP and is controlled by a remote-mounted Jackpot ECU. The ECU controls not just the fuel, but also the LS coils, and can be configured with built-in GM transmission control, eliminating the need for additional boxes, complex wiring, or add-on TPS sensors, saving you both time and money. The same kit works for both the early style 24x engines, as well as the 58x engines, without the need to buy additional harnesses. The kits with GM transmission control come with harnesses for popular 4L60E, 4L65E, 4L80E, and 4L85E transmissions. Jackpot TBI comes with base maps pre-installed for common LS combinations to help you dial in your engine and get on the road more quickly.

Features:

• 32-bit Power Architecture based processor for faster response
• Compatible with both 24X and 58X engines with no additional harnesses to buy
• Single Bosch LSU 4.9 wide band O2 sensor
• Self-Learning adaptive idle, fuel, and ignition controls
• Boost compatible
• Nitrous timing control
• Sequential fuel and spark control with individual cylinder trim
• Systems with GM transmission control include harnesses for most popular GM 4-speed automatic transmissions
• Programmable RPM limiters and launch controls
• Multi-fuel capable
• Individual cylinder ignition trim (RPM based)
• Map switching

Adding a TBI system to a GM LS engine has been done for years, but the JACKPOT series GM LS TBI EFI makes the conversion easier than ever! The throttle body features 4 100 LB./HR. EV6 injectors and supports GM LS engines up to 650HP and is controlled by a remote-mounted Jackpot ECU. The ECU controls not just the fuel, but also the LS coils, and can be configured with built-in GM transmission control, eliminating the need for additional boxes, complex wiring, or add-on TPS sensors, saving you both time and money. The same kit works for both the early style 24x engines, as well as the 58x engines, without the need to buy additional harnesses. The kits with GM transmission control come with harnesses for popular 4L60E, 4L65E, 4L80E, and 4L85E transmissions. Jackpot TBI comes with base maps pre-installed for common LS combinations to help you dial in your engine and get on the road more quickly.

Jackpot GM LS TBI is also available in a Top End Kit, which adds a mid-rise single plane aluminum intake manifold with the required 4150-style mounting flange. Intakes are available for both cathedral (LS1/2/6) and small rectangular (LS3) port cylinder heads.

Features:

• 32-bit Power Architecture® based processor for faster response
• Compatible with both 24X and 58X engines with no additional harnesses to buy
• Single Bosch LSU 4.9 wideband O2 sensor
• Self-Learning adaptive idle, fuel, and ignition controls
• Boost compatible
• Nitrous timing control
• Sequential fuel and spark control with individual cylinder trim
• Systems with GM transmission control include harnesses for most popular GM 4-speed automatic transmissions
• Programmable RPM limiters and launch controls
• Multi-fuel capable
• Individual cylinder ignition trim (RPM based)
• Map switching

Killshot 2 Pro EFI System

The Aces Killshot 2 Pro isn't just an upgrade, it's a statement.

Built for the driver who refuses to settle, this 4-barrel throttle body EFI system replaces your carb or outdated EFI with modern precision and raw power. Using a 4150-style flange and a recessed base, it drops right onto single or dual-plane manifolds. With support for up to 650 HP naturally aspirated and 575 HP under boost, the Killshot 2 Pro is made to feed whatever you're building: street bruiser, boosted weekend warrior, or nitrous-hungry drag car.

An integrated 3-bar TMAP sensor supports up to 27 psi of boost for turbo and supercharged applications, while four 100 lb/hr injectors comfortably feed up to 650 HP per throttle body. Need more? Run dual-quad and fuel up to 1,200 HP (requires an additional secondary throttle body unit and larger pump; both sold separately).

It's already compatible with blow-through, draw-through, and nitrous setups right out of the box. And when our boost control software update lands in Fall 2025, the hardware inside is already ready to run with PWM boost solenoid control for true precision under pressure.

Power Meets Simplicity

At Aces, we build EFI systems that make serious power simple.

The Killshot 2 Pro is a DIY-friendly system designed for enthusiasts of all skill levels. Wire it in, answer a few setup questions, fire it up, and the self-learning ECU takes over by fine-tuning your fuel maps automatically. For most street builds, that's all it takes. For the tuners who want total control, our free laptop software unlocks full manual tuning access, which is ideal for mild to aggressive builds running high-lift cams, forced induction, or nitrous.

Once your engine reaches operating temperature, the system goes closed-loop and starts learning in real time. After a few drives, your tune dials itself in, and when you're happy with it, you can disable learning and lock it down. That's confidence you can feel at every throttle blip.

Ignition Compatibility

Whether you're running an HEI, canister coil, or aftermarket system like MSD or Holley, the Killshot 2 Pro plays nice. It can also digitally control timing with a Hall-effect or mechanically locked magnetic distributor and works seamlessly with CD ignition boxes.

If you're looking to go all-in, Aces offers complete Hall-effect and magnetic distributors, ignition coils, and fuel systems designed to work together for maximum reliability and spark control.

Choose Your Setup

We know every build is different, so we made the Killshot 2 Pro modular. Build it your way and save while you do it.

• Standalone Kit: Includes the throttle body, ECU, wiring harness, and your choice of interface.
• Fuel Kit (Standalone + Fuel System): Adds a complete fuel system to your existing ignition setup.
• Top End Kit (Standalone + Distributor + Coil): Adds ignition components to your existing fuel system.
• Master Kit (Standalone + Fuel System + Distributor + Coil): Everything you need for a full carb-to-EFI conversion.

Choose any of these pre-built options and save 5% off the whole kit.

Interface Options

Choose how you want to set up and monitor your system:

• Bluetooth Module: Connects to Android (iOS support coming Fall 2025) through our free Aces Connect app.
• 5” Handheld Touchscreen: Full-color display with built-in GPS for real-time MPH.
• 7” Handheld Touchscreen: Bigger screen, same powerful features, also GPS-ready.

All three interfaces let you view RPM, speed, sensor data, live tuning metrics, and much more with customizable layouts. Bluetooth users will get GPS speed readouts with the Fall 2025 firmware update.

Engineered for Real Performance

The Killshot 2 Pro doesn't just look tough, it's built that way.

Every component is designed for precision, durability, and real-world performance.

• Remote-Mounted ECU: Unlike systems that bury electronics inside the throttle body, the Killshot 2 Pro keeps its ECU separate. This remote-mounted design protects it from heat and vibration, ensuring long-term reliability and easy serviceability.
• Cast Aluminum ECU Housing: Provides superior heat dissipation and RFI/EMI shielding. The ECU case doubles as a heatsink for internal drivers, improving reliability and lifespan.
• Bosch LSU 4.9 WBO2 Sensor: Faster, more accurate readings with the latest planar sensing technology.
• Integrated Fuel Pressure Sensor: Maintains proper fuel delivery by giving you real-time pressure monitoring directly from the throttle body. No external sensors or guessing.
• Progressive Linkage: Improved throttle tip-in for smooth response and crisp drivability.
• Ported Vacuum: Supports vacuum advance on non-timing-control distributors like HEI or mechanical setups.
• Roller Bearing Throttle Shafts: Reduce friction and eliminate idle issues caused by bushing wear.
• Low-Profile Design: Works with more air cleaner setups (including drop-base filters) while fitting easily under most factory and aftermarket air cleaners.

Next-Gen ECU Power (Gen 2 Technology)

This isn't just another ECU refresh; it's a total architecture upgrade.

The Gen 2 Aces ECU delivers faster processing, deeper tables, and smarter data handling for the most precise control we've ever offered.

Core System Upgrades:

• More Memory: Expanded program space for advanced control algorithms and adaptive strategies.
• DMA-Based ADC Acquisition: Faster, cleaner, and more accurate sensor readings.
• Enhanced Interrupt Handling: Responds quicker to changing conditions for smoother performance.
• Expanded Timer Functions: Greater precision for timing-critical events.

Mapping & Sensor Enhancements:

• 31x31 VE Tables: Almost triple the resolution for stock, mild, and race modes.
• 31x31 Self-Learning Tables: Sharper adaptive fuel control across every RPM band.
• 31x31 Ignition Maps: More detail means smoother spark transitions and better power delivery.
• Fuel Level Sensor Support: Integrates with your existing or aftermarket sender.
• Boost Control-Ready Hardware: Already compatible with boost setups and prepped for PWM boost control with software activation coming Fall 2025.
• Boost Pressure Monitoring: Direct sensor acquisition for live boost tracking.

System Integration

The Killshot 2 Pro connects seamlessly with Dakota Digital clusters using the Aces BIM-01-2-ACES module (sold separately). It outputs a clean tach signal for both factory and classic-style gauges and supports systems that don't rely on CAN data.

If you're moving from a stock or aftermarket EFI that uses CAN to drive your gauges, you may need to review those connections for compatibility.

All Aces ECUs are built on 32-bit automotive-grade processors, the same specs used by OEM manufacturers, not the slower, industrial-grade 16-bit chips common in other aftermarket systems.

The system runs at 43–60 PSI fuel pressure and supports return or returnless configurations, depending on your pump. Internally regulated in-tank pumps can run returnless, while external, inline, or surge setups will need a return line.

Easy Weekend Install

For most applications, we built the Killshot 2 Pro to install in a weekend. No crew, no laptop wizardry. Bolt it on, wire it up, answer a few setup questions, and let it learn. From the first startup to full throttle, it's designed to be as straightforward as EFI gets.

When you're ready to leave the carb behind, the Killshot 2 Pro gives you everything you love about old-school performance with all the brains of modern EFI.

No compromises. No headaches. Just results.

Formerly called the "Killshot Classic"

Have you ever thought about EFI for your project, but were intimidated by the installation process, or worried that the typical 650HP-rated TBI system was too much for your stock or lower-powered engine? Aces has listened and developed the Killshot Lite to better suit those applications.

Key Features:

• Plug and play
• 400 HP
• Easy install
• 5”handheld with GPS speedometer
• Next level RFI / EMI protection
• Base calibrations set in a real world environment
• the most affordable upgrade

The Killshot Lite has (4) 65 lb/hr injectors and is 400 HP capable. Timing control has been removed, allowing an easier installation with your existing distributor. The base calibration installed in the unit is for a mild 350 SBC with an HEI distributor and is easily scaled for other displacements. The TPS, IAC, and TMAP sensors are integrated into the unit for simpler wiring. Dual electric fan controls are retained, as well as an easy-to-use touchscreen, handheld controller for initial setup, tuning, and gauge displays. All of this means that you will spend less time with setup and be able to get your vehicle back on the road quickly!

Simpler installation, improved drivability, and at a lower cost! The Killshot Lite is the best option for your truck, daily driver, or mild cruiser!

Aces' Killshot EFI system is one of the most advanced throttle body injection (TBI) systems on the market. The Killshot utilizes four 100 lb/hr fuel injectors, giving the system the capability of supporting up to 650 horsepower. The system includes the throttle body (with integrated fuel injectors, TPS sensor, MAP sensor, IAT sensor, and stepper motors), wiring harness, WBO2 sensor, ECU, and a 5” touchscreen handheld programmer for easy tuning and monitoring of engine data. 

The Killshot system fits most 4150-flange 4-barrel intake manifolds and is designed for easy installation and tuning. For stock to mild applications, the calibration wizard and self-learning features mean advanced tuning knowledge or experience is not required. But for more aggressive or performance oriented applications, Aces offers a full tuning software suite and USB data cable for advanced manual tuning.

Aces designed its throttle body systems with the ECU separate from the throttle body. This alleviates any issues with possible damage to the ECU from unwanted engine heat or vibration. This is a common problem with other “all-in-one” style systems on the market.

Whether you are building a budget beater or a boosted racing car, Aces EFI’s Killshot system has the technology and advanced features you need, in an easy-to-install, easy-to-tune package so you can take your ride to the next level!

For timing control, the Killshot requires a magnetic pickup or hall effects distributor and separate ignition coil. We recommend our Black Jack Pro series distributor and ignition coil for a plug & play experience.

Aces EFI Killshot™ TBI System Features

32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors

5” full-color touchscreen handheld with built-in GPS speedometer

Integrated coil driver for ignition timing control

Simple calibration wizard for initial setup- no laptop tuning required.

Self-learning fuel table

Dual fan control

Step retard for nitrous control

Boost compatibility (using laptop software)

Remote-mounted ECU to avoid common heat/vibration-induced hardware failures

3-bar TMAP sensor for boost & nitrous compatible (using laptop software)

Free laptop software available for pro applications

Compatible with Aces’ handhelds, dashes, CAN modules, and TCMs.

Bosch 4.9 WBO2 sensor

(4) 100 lb/hr injectors

Aces EFI’s Royal Flush EFI/CDI is the most powerful TBI system on the market! Integrating our EFI control module and CDI ignition system inside one ECU, this is a revolutionary upgrade and huge leap forward in the world of aftermarket EFI products. By using CDI, you are able to create a much hotter spark in order to burn fuel more efficiently and ensure maximum power, especially in boosted and performance applications.

The Royal Flush EFI/CDI system utilizes four 100 lb./hr. fuel injectors, giving the system the capability of supporting up to 650 horsepower. The system includes the throttle body (with integrated fuel injectors, TPS sensor, MAP sensor, IAT sensor, and stepper motors), wiring harness, wideband O2 sensor, ECU, and a 5” touchscreen handheld programmer for easy tuning and monitoring of engine data. 

The system fits any 4150-flange 4-barrel intake manifold and is designed for easy installation and tuning. Installation is straightforward and easy, and the system includes everything you need to get on the road or track quickly. For stock to mild applications, the calibration wizard and self-learning features mean advanced tuning knowledge or experience is not required. But for more aggressive or performance oriented applications, Aces offers a full tuning software suite and USB data cable for advanced manual tuning.

Aces designed its throttle body systems with the ECU separate from the throttle body. This alleviates any issues with possible damage to the ECU from unwanted engine heat or vibration. This is a common problem with other “all-in-one” style systems on the market.

Whether you are building a budget beater or a boosted racing car, Aces EFI’s Killshot EFI kit has the technology and advanced features you need, in an easy-to-install, easy-to-tune package so you can take your ride to the next level!

Killshot ECU
This ECU is the service replacement for all ACES Killshot EFI systems, including Killshot Classic and is compatible with all ACES handhelds, dashes, CAN modules, and TCMs. The Killshot ECU features 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors.

Royal Flush ECU
This ECU is the service replacement for all ACES Royal Flush EFI/CDI systems and is compatible with all ACES handhelds, dashes, CAN modules, and TCMs. The Royal Flush ECU features 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors, and features an integrated CDI ignition system.

Deuces Wild ECU
This ECU is the service replacement for all ACES Deuces Wild EFI systems and is compatible with all ACES handhelds, dashes, CAN modules, and TCMs. The Deuces Wild ECU features 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors.

Wild Card ECU
This ECU is the service replacement for all ACES Wild Card EFI systems and is compatible with all ACES handhelds, dashes, CAN modules, and TCMs. The Wild Card ECU features 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors.

The Joker ECU
This ECU is the service replacement for all ACES The Joker EFI/CDI systems, and is compatible with all ACES handhelds, dashes, CAN modules, and TCMs. The Joker ECU features 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors, and features an integrated CDI ignition system.