Aces EFI Upgrade Program
Upgrade your old carburetor or EFI system and receive up to $400 Upgrade Credit toward a new Aces EFI system.
Easier Installation
Designed for enthusiasts and weekend builders with an easy-to-install system.
Self-Learning Technology
Automatically adjusts and optimizes fueling while you drive.
Better Performance
Improved throttle response, smoother drivability, and reliable cold starts.
Built for Real Drivers
Perfect for classic cars, muscle cars, trucks, Jeeps, and street rods.
Is This Program Right for You?
If you're currently running any of the following systems, you're likely eligible for the Aces EFI Upgrade Program:
- Carburetor
- Older TBI System
- Holley EFI
- FiTech EFI
- Edelbrock EFI
- FAST EFI
- MSD Atomic EFI
Not sure if you qualify? Apply anyway—we'll review your submission and let you know.
Upgrade in 4 Easy Steps
Step 1
Apply Online
Complete the application form and upload photos of your current fuel system.
Step 2
Get Approved
We'll review your submission within 1 business day.
Step 3
Receive Your Upgrade Credit
A unique one-time discount code will be sent to your email.
Step 4
Upgrade Your EFI
Use your Upgrade Credit on eligible Aces EFI systems.
Eligible Upgrade Systems
Upgrade Credit is available on the following premium Aces EFI systems.
Killshot Series
Eligible for $300 Upgrade Credit
The easy path to EFI — ideal for carbureted and older TBI vehicles.
Multi-Port EFI Series
Eligible for $300–$400 Upgrade Credit
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 from August 10 through September 30, 2026.
- Upgrade Credit Eligibility
Tier 1: Customers currently using a carburetor or older TBI system are eligible to receive a $300 Upgrade Credit.
Tier 2: Customers currently using an older EFI system (including Holley, FiTech, Edelbrock, FAST, MSD Atomic EFI, and other qualifying EFI systems) are eligible to receive a $400 Upgrade Credit. - Application Requirements
To apply, customers must complete the online application form and upload photos of their current carburetor or EFI system. Additional photos of the system installed on the vehicle are recommended to help verify eligibility.
- No Trade-In Required
Customers are not required to return or ship their current carburetor or EFI system.
- Application Review
Applications will typically be reviewed within one business day. Approved customers will receive a confirmation email with their Upgrade Credit.
- Discount Code
Upgrade Credits will be issued as a unique one-time-use discount code and may only be used by the approved customer.
- Promotion Restrictions
Upgrade Credits cannot be combined with any other discounts, promotional offers, or coupon codes.
- Eligible Products
Upgrade Credits are valid only on the following eligible Aces EFI products: Killshot Fusion Master Kit, Killshot 2 Pro Master Kit, Wild Card Top End Kit, Wild Card Master Kit, The Joker Top End Kit, and The Joker Master Kit.
- Program Changes
Aces EFI reserves the right to modify or discontinue this program at any time without prior notice.
Scroll to read all program rules
- Campaign Period
The Aces EFI Upgrade Program is valid from August 10 through September 30, 2026.
- Upgrade Credit Eligibility
Tier 1: Customers currently using a carburetor or older TBI system are eligible to receive a $300 Upgrade Credit.
Tier 2: Customers currently using an older EFI system (including Holley, FiTech, Edelbrock, FAST, MSD Atomic EFI, and other qualifying EFI systems) are eligible to receive a $400 Upgrade Credit. - Application Requirements
To apply, customers must complete the online application form and upload photos of their current carburetor or EFI system. Additional photos of the system installed on the vehicle are recommended to help verify eligibility.
- No Trade-In Required
Customers are not required to return or ship their current carburetor or EFI system.
- Application Review
Applications will typically be reviewed within one business day. Approved customers will receive a confirmation email with their Upgrade Credit.
- Discount Code
Upgrade Credits will be issued as a unique one-time-use discount code and may only be used by the approved customer.
- Promotion Restrictions
Upgrade Credits cannot be combined with any other discounts, promotional offers, or coupon codes.
- Eligible Products
Upgrade Credits are valid only on the following eligible Aces EFI products: Killshot Fusion Master Kit, Killshot 2 Pro Master Kit, Wild Card Top End Kit, Wild Card Master Kit, The Joker Top End Kit, and The Joker Master Kit.
- Program Changes
Aces EFI reserves the right to modify or discontinue this program at any time without prior notice.
Frequently Asked Questions
Do I need to send in my old carburetor or EFI system?
No. Simply upload photos during the application process.
How long does approval take?
Most applications are reviewed within 1 business day.
Can I combine this Upgrade Credit with other promotions?
No. Upgrade Credit cannot be combined with any other discounts or promotional offers.
Which products qualify?
Only eligible Killshot Master Kits and MPFI systems listed on this page qualify.
Can I apply if my current EFI is from another brand?
Yes. Both older Aces EFI systems and other EFI brands are eligible for the Aces EFI Upgrade Program.
How will I receive my Upgrade Credit?
After approval, you'll receive a unique one-time discount code by email.
Apply for Your Upgrade Credit
Complete the form below and upload photos of your current system. Our team will review your application and contact you within 1 business day.
See Aces EFI in Action
Watch real installations, product overviews, and customer builds to see how easy it is to upgrade with Aces EFI.
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Step-by-step Wild Card MPFI installation walkthrough from the Aces team.
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Full MPFI upgrade install walkthrough on a classic Camaro build.