What is the primary benefit of the EZ-EFI Dual Quad Upgrade Kit?

This kit allows your FAST EZ-EFI system to support engines making over 1200 horsepower by enabling a dual quad carburetor-style manifold setup. It's designed for more aggressive applications that require significantly more fuel and airflow than a single throttle body can provide.

Do I need to replace my manifold to use this kit?

No, you do not need to replace your manifold. This upgrade kit is designed to work with any 4150-style carbureted manifold, and it also works with your original carb-style throttle linkage.

What is included in the FAST EZ-EFI Dual Quad Upgrade Kit?

The kit includes one EZ Fuel Throttle Body Unit, which is intended to be run in tandem with your existing EZ Fuel throttle body. The updated wiring harness and ECU hardware are also part of the system for improved performance and protection.

FAST EZ-EFI Dual Quad Upgrade Kit 304155-06

Name: FAST EZ-EFI Dual Quad Upgrade Kit
Brand: FAST
Price: 1048.63 USD
Availability: InStock

FAST EZ-EFI Dual Quad Upgrade Kit

$1048.63

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

FAST EZ-EFI Dual Quad Upgrade Kit 304155-06. Supports 1200+ HP engines with dual quad manifolds.

Key Features

Fits 136+ vehicle make/model combinations.
Supports engines making 1200+ horsepower when used with dual quad carburetor-type manifolds.
Includes one EZ Fuel Throttle Body Unit for tandem operation.
Works with existing FAST EZ-EFI Fuel systems.
Retains original carb-style throttle linkage.
Updated ECU hardware offers improved protection against electrical and ignition noise.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

If you're looking to push your engine's power well beyond the 650 horsepower mark, the FAST EZ-EFI Dual Quad Upgrade Kit is what you need. This kit is designed to work with existing EZ-EFI Fuel systems and allows you to run a dual quad carburetor-style manifold setup, capable of supporting over 1200 horsepower. It's a significant step up for aggressive builds, offering a way to get the benefits of electronic fuel injection on high-output engines without needing a completely new manifold.

This upgrade kit includes one EZ Fuel Throttle Body Unit, specifically made to run in tandem with your existing EZ Fuel throttle body. This means you can leverage the self-tuning capabilities of your FAST EFI system while feeding a much larger appetite for fuel and air. The system is designed to bolt onto any 4150-style manifold, and it retains your stock carb-style throttle linkage. FAST has also updated the ECU hardware for better protection against electrical noise and damage, and the wiring harness is now more streamlined with added fuses for protection. You'll still get the easy-to-use color touchscreen hand-held with its setup wizard and diagnostic features, including error alerts and a shift light function.

This kit is a great way to get more performance out of your street rod or muscle car, especially if you're running a dual quad setup. It's designed to work with most ignition systems, including HEI, and uses standard GM sensors that are readily available. While it's a significant upgrade for high-horsepower applications, remember that it's not CARB approved and cannot be shipped to California.