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 Killshot 2 Pro is the ultimate evolution of our throttle body EFI lineup—built on the proven foundation of Killshot 2 and enhanced with deeper tuning control, dual-quad capability, and upgraded hardware. It includes every feature of Killshot 2 plus expanded tables and strategies for serious builders who want maximum flexibility and precision. Over the past two years, we’ve gathered real-world feedback from tuners, racers, and street enthusiasts to refine and improve every aspect of the system. The result is an EFI package that’s more powerful, more versatile, and even easier to install and tune.

Why upgrade from a carburetor?

Carburetors demand constant compromise. EFI doesn’t. Killshot 2 Pro dynamically adjusts fuel delivery in real time for weather, altitude, and load—eliminating hesitation, cold-start issues, and the need to re-jet for changing conditions. Expect precision fuel control, improved throttle response, and seamless adaptability whether you’re cruising in traffic, blasting down the strip, or hunting laps at the track.

Engineered for power and durability

At the core is a high-speed 32-bit ECU delivering fast, accurate engine management for naturally aspirated and boosted combos. An integrated 3-bar TMAP sensor supports up to 27 psi of boost for turbo and supercharged applications. Each throttle body carries four 100 lb/hr injectors, comfortably supporting up to 650 HP per unit. Need more? Run dual-quad and fuel up to 1,200 HP (requires an additional slave unit; second unit sold separately).

Maintaining proper fuel pressure is critical for EFI performance. The Pro’s built-in fuel pressure sensor gives you real-time fuel pressure monitoring, ensuring consistent delivery under all conditions—no external sensors or guessing.

Remote-mounted ECU for reliability

Many EFI systems bury the ECU inside the throttle body, where heat and vibration shorten lifespan. Killshot 2 Pro uses a separate, remote-mounted ECU to keep electronics cool, stable, and serviceable for the long haul.

Expanded tuning & control

Killshot 2 Pro takes tuning further while keeping day-to-day operation simple:

• 31×31 VE Fuel Tables – Higher resolution across the full load/RPM range.
• 31×31 MBT Spark Tables – More precise ignition control under any condition.
• Closed-Loop Learning (expanded resolution) – Smarter corrections for street and mild builds.
• Self-Learning Strategy (clarified): The system does not “self-tune” end-to-end. You select a base calibration matched to your combo; the ECU refines fueling as you drive. Ideal for stock-to-mild engines. Aggressive setups—high-lift cams, forced induction, or nitrous—benefit from manual tuning for optimal results.
• Progressive Throttle Linkage – Smoother, more linear tip-in for excellent street manners versus “on/off” TBI behavior.
• Boost Control & Fuel Level Inputs – Hardware-ready for future software unlocks (e.g., boost-solenoid control, dash integration).

Handheld + PC software

Every Pro system includes our 3rd-generation 5" HD touchscreen handheld for setup, data viewing, and real-time diagnostics. For advanced users, the Pro PC Tuning Suite provides manual access to AFR targets, ignition strategies, boost enrichment, and more.

Built for easy installation & maximum compatibility

EFI conversions shouldn’t be complicated. Killshot 2 Pro is designed for straightforward installs and broad compatibility:

• Fits 4150-flange 4-barrel intake manifolds (universal 4-barrel fitment)
• Low-profile throttle body design works with more air cleaner setups—including drop-base filters
• Standalone or Complete Kit options to match your build plan

Who it’s for

Whether you’re refining a weekend cruiser, dialing in a high-compression race motor, or pushing a turbocharged street car, Killshot 2 Pro delivers the reliability and power of modern EFI with the simplicity of a 4-barrel TBI—plus headroom to grow.

System features (all the benefits of Killshot 2, plus more)

• Supports up to 650 HP per unit (NA) / up to 1,200 HP in dual-quad (NA)
• Four 100 lb/hr fuel injectors per throttle body
• Integrated 3-bar TMAP sensor – Supports up to 27 psi boost
• Built-in fuel pressure sensor – Real-time fuel pressure monitoring for precise control
• Progressive throttle linkage – Smooth response and drivability
• Remote-mounted ECU – Improved reliability and serviceability
• TPS output – For transmission controllers, nitrous activation, and other external modules
• 4150 flange – Universal fitment for 4-barrel intake manifolds
• Low-profile design – Compatible with more air cleaner options, including drop-base filters
• Available finishes: Black, Polished, Gold
• Standalone or Complete Kit Options – Choose the package that fits your build

What you can expect

• Faster starts in all weather, stable idle quality, and crisp throttle response
• Consistent fueling on the street, track, or strip—even with altitude and temperature swings
• Easy initial setup with room to grow into advanced tuning as your combo evolves

Killshot 2 Pro gives you everything enthusiasts love about Killshot 2—and then some. If you’re upgrading from a carburetor or stepping up from a basic EFI, the Pro is the intelligent path to fuel, tune, and dominate with confidence.

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.