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Killshot Fusion features a fully integrated ECU built into the throttle body, reducing wiring, simplifying installation, and delivering reliable performance in any environment.
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What we offer
Everything you need to upgrade, tune, and take control—whether you're converting from carb or building a high-performance EFI system from the ground up.
Ditch the carb and upgrade your classic or modern engine with one of our easy-to-install EFI systems. Whether you choose our Throttle Body Injection (TBI) kits for their affordability and simplicity, or go all-in with Multi-Port EFI (MPEFI) for maximum tunability and horsepower potential, we’ve got the right fit for your build.
TBI systems like the Killshot or Deuces Wild offer a retro look with modern reliability—perfect for street cruisers and weekend warriors. If you're after finer control, sequential injection, or running boost, our Wild Card and Royal Flush multi-port systems give you the tools to unlock your engine’s full potential.
Not sure which to choose? Our detailed guides and real-human support make finding the right system quick and painless.
Running a late-model LS, LT, HEMI, or other modern platform? Our Jackpot Series EFI systems are built to give you full control of your high-performance engine with modern tuning, expandability, and seamless integration.
Choose from TBI or Multi-Port EFI options depending on your goals—whether you’re swapping into a restomod, dialing in a boosted setup, or just want a cleaner, more tunable alternative to factory electronics. All Jackpot systems support both 24x and 58x crank triggers, are boost-ready, and are compatible with drive-by-cable or (select models) drive-by-wire setups.
From the streamlined Jackpot Lite to the fully featured Jackpot LS Pro, you get support for transmission control, sequential injection, multiple O2 sensors, and more—all without needing factory ECUs or complicated re-flashes.
Aces delivers a full lineup of performance components to support your build from top to bottom. Pair your EFI kit with CDI ignition systems, high-energy distributors, coils, and manifolds that are engineered for seamless compatibility and serious spark.
Want to go deeper? Our Top End and Master Kits bundle everything you need—from throttle body to fuel delivery—taking the guesswork out of custom builds. Whether you're piecing together a street machine or assembling a boosted track car, we offer the parts, packages, and support to do it right the first time.
Everything we make is designed to work together, so you spend less time troubleshooting and more time turning the key.
Shows & Events
Check out all of the events we attend throughout the year and make sure to stop by and see us!
See allFrom 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
Customer Experience Image
Morgan Cook
Morgan Cook's stunning 1964 Dodge Polara
Michael Krozell
Mustang + Royal Flush combo is just that
Nick Waag
1947 coupe, running a 350 (and a Killshot of course)
Rob Morse
EPIC 1950 3600! Classic 6.0/4l80 swap rockin Jackpot system
Aaron Demers
93 LX running a Royal Flush!
Adam Wichers
1986 Toyota Corolla AE86 GTS. Running a 5.3 LS powered by the Aces Jackpot system.
Donavan McDaniel
84 Chevy S10 Durango
Mike Jabbs
The Jackpot kit on the 6.0 looks killer!
Jerrod Keating
Running the Jackpot, and he told us it started and ran on his very first attempt after install.
Customer Experience Video
Josh’s ‘87 R10
Jim Corman's '91 Foxbody Running the Killshot Top-End Kit
Ari with a BT-Module installed on her Monte Carlo SS
Killshot 2 on a Shelby Cobra.
Enjoy the Power of LS with the Aces Jackpot
Jackpot LS Showing off in California
Rock Crawlin' in California!
Nova + Killshot = Epic
Better Off With A Royal Flush
TestimonialLouis' 1948 Chevy Thriftmaster
Blog
Which Aces EFI System is Right for You?
While you may be used to searching for a product based on the year/make/model of your vehicle, when it comes to our EFI systems, we are able to utilize a slightly different and somewhat more versat...
Killshot II Review - Bryant Stilwell
The very first feature that stood out: the shape and size now fit under a 14” air cleaner drop base! This is a huge improvement for vehicles like mine with a tall intake and low hood clearance.
Exciting News: Aces EFI Upgrades Warranty Program to Better Serve You! At Aces EFI, we are committed to providing exceptional support and ensuring our customers feel confident in their purchases. T...