Aces EFI Upgrade Program
Upgrade your old carburetor or EFI system and receive up to $400 Upgrade Credit toward a new Aces EFI system.
Easy Installation
Designed to make EFI conversion simpler.
Self-Learning Technology
Helps simplify tuning and setup.
Modern EFI Performance
Better drivability, control, and consistency.
Built for Your Build
EFI solutions for classic cars, muscle cars, hot rods, and more.
Is This Program Right for You?
You may qualify if you're currently running:
- Carburetor
- Older TBI System
- Holley EFI
- FiTech EFI
- Edelbrock EFI
- FAST EFI
- MSD Atomic EFI
- Other Older EFI Systems
Not sure which category you fall into? Select the system you currently have when applying.
Upgrade in 4 Easy Steps
Step 1
Select Your Current System
Choose Carburetor / Older TBI or Older EFI System.
Step 2
Fill Out the Form
Enter your name and email. Phone number is optional.
Step 3
Get Your Upgrade Credit
Your Upgrade Credit Code will appear immediately and be sent to your email.
Step 4
Shop & Upgrade
Use your code to purchase any eligible Aces EFI product.
Eligible Upgrade Systems
Use your Upgrade Credit on any of the following eligible Aces EFI systems.
Killshot Series
The easy path to EFI — ideal for carbureted and older TBI vehicles.
Multi-Port EFI Series
For builds that demand more control, performance, and tuning flexibility.
Program Rules
Please review the following program rules before submitting your application:
- Campaign Period
The Aces EFI Upgrade Program is valid through September 30, 2026.
- Upgrade Credit Eligibility
Carburetor / Older TBI → $300 Upgrade Credit
Older / Competitor EFI → $400 Upgrade Credit
- No Trade-In Required
You do not need to return or ship your current system.
- Application
Complete the online application and provide information about your current fuel system.
- Upgrade Credit Code
Your Upgrade Credit Code will appear immediately and be sent to your email.
- Eligible Products
Upgrade Credits can be used on eligible Killshot and Multi-Port EFI products listed on this page.
- Promotion Restrictions
Upgrade Credits cannot be combined with any other discounts, promotional offers, or coupon codes.
- Program Changes
Aces EFI reserves the right to modify or discontinue the program at any time.
Scroll to read all program rules
- Campaign Period
The Aces EFI Upgrade Program is valid through September 30, 2026.
- Upgrade Credit Eligibility
Carburetor / Older TBI → $300 Upgrade Credit
Older / Competitor EFI → $400 Upgrade Credit
- No Trade-In Required
You do not need to return or ship your current system.
- Application
Complete the online application and provide information about your current fuel system.
- Upgrade Credit Code
Your Upgrade Credit Code will appear immediately and be sent to your email.
- Eligible Products
Upgrade Credits can be used on eligible Killshot and Multi-Port EFI products listed on this page.
- Promotion Restrictions
Upgrade Credits cannot be combined with any other discounts, promotional offers, or coupon codes.
- Program Changes
Aces EFI reserves the right to modify or discontinue the program at any time.
Frequently Asked Questions
Can I participate if I have an older Aces EFI system?
Yes. Customers currently using an older Aces EFI system may also qualify for the Upgrade Program.
Do I need to send in my old system?
No. No trade-in or return is required. You can keep your current system.
How much Upgrade Credit can I receive?
Carburetor / Older TBI systems qualify for $300 Upgrade Credit. Older EFI systems qualify for $400 Upgrade Credit.
Which products can I use my Upgrade Credit on?
Your Upgrade Credit can be used on eligible Killshot and Multi-Port EFI products listed on this page.
Can I use the Upgrade Credit with other promotions?
No. Upgrade Credit Codes cannot be combined with other discounts, promotional offers, or coupon codes.
When will I receive my Upgrade Credit Code?
Your Upgrade Credit Code will be displayed immediately after you submit your application.
Apply for Your Upgrade Credit
Tell us about your current system to get your Upgrade Credit.
See Aces EFI in Action
Watch real installations, product overviews, and customer builds to see how easy it is to upgrade with Aces EFI.
Irish Outlaw Garage
ACES KILLSHOT 2 EFI ~ FULL INSTALL in 1968 Buick Electra 225
In this video, we're diving back into the world of fuel injection as we upgrade our 1968 Buick Electra 225 with the ACES Killshot 2 EFI system.
Bryant Stilwell
Killshot Fusion Throttle Body Comparison
Product overview and throttle body comparison for Killshot Fusion.
@Aces Fuel Injection
Killshot Fusion EFI + Gambler Distributor + Tank Conversion Kit Install on a FOX BODY MUSTANG
This build shows how easy it can be to bring modern EFI performance to a classic Mustang.
Multi-Port EFI Series
Aces Fuel Injection
Wild Card Installation Guide
Step-by-step Wild Card MPFI installation walkthrough from the Aces team.
Aces Fuel Injection
The Joker Installation Guide
Complete The Joker MPFI system install on a classic C-10 build.
Aces Fuel Injection
The Joker EFI Big Block Camaro Install
Full MPFI upgrade install walkthrough on a classic Camaro build.