Aces Killshot II 4-BBL EFI System

The Killshot II 4-BBL EFI System is more than just an upgrade—it' s a complete evolution of throttle body fuel injection. 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 original Killshot system. The result is an EFI system that is more powerful, more versatile, and easier to install and tune than ever before.

If you' re still running a carburetor, it' s time to ask yourself: Why settle for outdated technology when EFI offers superior drivability, reliability, and performance? Unlike carburetors, EFI systems automatically adjust fuel delivery based on real-time conditions, meaning no more hesitation, no more cold start issues, and no need to constantly re-jet for changing weather or altitude. With Killshot II, you get precision fuel control, improved throttle response, and seamless adaptability, whether you' re on the street, track, or strip.

At the heart of the Killshot II is a high-performance ECU that offers 32-bit processing, allowing for faster and more precise engine management. Whether you're running naturally aspirated or boost, this system adapts to your setup, providing accurate fueling and consistent power delivery. It comes equipped with a 3-bar TMAP sensor, supporting up to 27 lbs of boost, making it ideal for forced induction applications.

For those looking to push even higher horsepower, Killshot II supports dual-quad configurations, allowing two units to work together to fuel up to 1200 HP (requires an additional slave unit). Whether you' re running a weekend cruiser, a high-compression race motor, or a turbocharged street car, Killshot II delivers the reliability and performance you need.

Maintaining proper fuel pressure is critical for EFI performance. With Killshot II' s built-in fuel pressure sensor, you get real-time fuel pressure monitoring, ensuring consistent fuel delivery under all conditions. This means no more external sensors or guessing—just accurate fuel data at your fingertips.

Advanced Tuning & Control

Tuning your engine shouldn' t be a guessing game. That' s why Killshot II comes with our 3rd-generation 5" HD touchscreen handheld, giving you complete control over your EFI system. With an intuitive interface and Pro PC Tuning Software, you can fine-tune parameters to match your exact performance goals.

• Self-Learning Capabilities – While our system will not " self-tune" in the traditional sense, it does offer advanced self-learning fuel strategies. A base tune is selected based on your engine' s setup, and the system then refines fuel delivery as you drive. This is ideal for stock to mild applications, but more aggressive setups—such as high-lift camshafts, forced induction, and nitrous—will require manual tuning for optimal performance.
• Progressive Linkage for Improved Drivability – Unlike traditional TBI setups that operate more like a digital on/off switch, Killshot II features a progressive linkage for smoother, more linear throttle control. This means better street manners without sacrificing performance.
• Remote-Mounted ECU for Durability – Many EFI systems house the ECU inside the throttle body, exposing it to heat and vibration. Killshot II' s separate ECU design eliminates this problem, ensuring better reliability and long-term durability.

Built for Easy Installation and Maximum Compatibility

EFI conversions shouldn' t be complicated, and Killshot II is designed for straightforward installation. It fits most 4150-flange 4-barrel intake manifolds, and thanks to its low-profile throttle body design, it' s compatible with more air cleaner setups—including drop-base filters.

Additional Features & Compatibility:

• Supports up to 650 HP NA (Naturally Aspirated)
• 4150 Flange – Universal fitment for 4-barrel intake manifolds
• Available in Three Finishes – Black, Polished, and Gold
• Integrated 3-bar TMAP Sensor – Supports up to 27 lbs boost
• Built-In Fuel Pressure Sensor – Real-time monitoring for precise fuel control
• TPS Output – Provides compatibility with other external modules such as trans control, nitrous controllers, etc.
• Standalone or Complete Kit Options – Choose the package that fits your build

With the Killshot II, you get the best of both worlds—the reliability of modern EFI with the power and simplicity of a 4-barrel throttle body system. Whether you' re upgrading from a carburetor for better cold starts and fuel efficiency, or pushing a high-boost application that demands precision fuel control, Killshot II is built to handle it all.