Upgrade your old carburetor or EFI system and receive up to $400 Upgrade Credit toward a new Aces EFI system.
A limited-time opportunity to upgrade to smarter EFI technology with exclusive Upgrade Credit on eligible systems.
Up to $400 Upgrade Credit
No Trade-In Required
Reviewed Within 1 Business Day
Why Upgrade to Aces EFI?
Whether you're replacing an old carburetor or upgrading from another EFI system, Aces EFI delivers modern performance with a simple installation and self-learning technology.
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.
Killshot Series
Eligible Upgrade Systems
Suitable for customers upgrading from carburetors or older TBI systems.
Upgrade Credit is available on the following premium Aces EFI systems.
Multi-Port EFI Series
Maximum Performance & Drivability
Wild Card and The Joker systems qualify for Tier 1 and Tier 2 Upgrade Credit.
Program Rules
- Program Period: August 10 – September 30, 2026
- Tier 1: Current Carburetor / Older TBI → $300 Upgrade Credit
- Tier 2: Competitor EFI → $400 Upgrade Credit
- Verification: Upload photos of your current system
- Trade-In Required: No
- Approval Time: Within 1 Business Day
- Discount Code: One-Time Use Only
- Promotions: Cannot be combined with other offers
- Eligible Products: Qualified Master Kits & MPFI Systems Only
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. Holley, FiTech, Edelbrock, FAST, MSD Atomic EFI, and other competitor EFI systems are eligible for Tier 2 Upgrade Credit.
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.
Killshot Series
See Aces EFI in Action
Watch real installations, product overviews, and customer builds to see how easy it is to upgrade with Aces EFI.
Justin Richardson
Killshot Fusion Customer Build
Real customer upgrade story featuring the Killshot Fusion system.
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Killshot Fusion Throttle Body Comparison
Product overview and throttle body comparison for Killshot Fusion.
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Aces EFI Killshot Fusion 1967 C20 Chevy
Installation highlights on a classic Chevy truck build.
Multi-Port EFI Series
Explore Wild Card and The Joker upgrade stories from real Aces EFI customers.
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Wild Card Sequential EFI Overview
Multi-Port EFI upgrade story showcasing Wild Card performance.
Justin Richardson
The Joker EFI Customer Build
Customer build featuring MPFI system drivability and tuning.