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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.
Carb to EFI Conversion Made Simple
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.
EFI Systems for Modern Engines
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.
Complete EFI Ecosystem
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.
Featured Customer Builds
@Phil.Madden
@stankybenz
Deuces Wild 2-bbl EFI on a '73 Mercedes-Benz 280C
Dwayne Pettis
Killshot 4-BBl EFI
Ricky Ohh
Jackpot LS system on an LS2
Torqstorm supercharger with a 2.65 pulley from Griptec
Brian Webster
KillShot Master Kit w/255 Tight-Fit In-Tank Fuel Pump on a 1969 Chevrolet C10 truck.
Installed by Carl Smith
Tuned by ProtoTechLLC
@gaugeslides
Jackpot LS on a 4.8 in a 1963 Chevrolet Impala
@jessegetssideways
Jackpot LS EFI System on a 2000 e46 with a 4.8 LS and a Summit cam.
@nomadicdynollc
Killshot II on the Dyno
Latest News
Killshot Tuning Guide Chapter 6: Definitions
Check out chapter 6 of the upcoming Killshot Tuning Guide! Written by Tim Moore Tap here to view the PDF
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...
Aces Authorized Vendors
Have a question? We are here to help.
Check out some of the most common questions our customers ask. Still have questions after? Contact our customer support.
I have *insert engine of choice.* Which of your systems will work with it?
Many of our systems work with a wide variety of engine combinations. We have TBI-style systems that fit 2300 and 4150-style flanges respectively; Port Injection (MPEFI) that are designed for classic small blocks (Chevy/Ford); and LS systems for LS1, LS2, LS3, LS6, L92, LR4, and many other LS style engines.
What do I need to convert from carb to EFI?
Modern EFI requires a high pressure fuel delivery system, and compatible ignition components. You can (usually) use your stock ignition setup, but sometimes at the cost of losing out on timing control features. Check out our master kits here, or give us a call to see if your setup may already be compatible.
Are your systems boost & E85 compatible?
E85, yes. This just requires a few basic setting changes from the handheld. For boost compatibility (not control) you just need to adjust the MAP sensor scaling in our free laptop software.
Why should I choose Aces vs. the other brands?
Check out our article here!
What kind of warranty do you offer?
All products have a limited one year warranty against any defects or quality of workmanship from date of purchase.
Our warranty is extended to the original consumer only. This limited warranty is not assignable or otherwise transferable. Customers must provide proof of purchase for warranty claims.
Aces’ warranty does not apply to products, which have been:
- Modified or altered from factory condition.
- Subjected to adverse conditions, such as misuse, neglect, accident, improper installation or adjustment, dirt or other contaminants, water, or corrosion.
- Installed in other applications not recommended by Aces Fuel Injection.
Read our full warranty policy here.
What is your return and refund policy?
Aces Fuel Injection is happy to accept returns on orders returned to us inside our policy as long as they are new and unused. In general, items must be returned within 30 days for a full refund or within 60 days for a 10% restocking fee.
For our full Refund & Return Policy, that has all of the fine print, you can access it here.
My question isn't listed...
Check out our FAQ section or give us a call during business hours and we will be happy to assist you!