What is the airflow rating of this throttle body?

This FAST throttle body is rated to flow 2,000 CFM (Cubic Feet per Minute). This high airflow rating is suitable for performance applications where maximum air intake is required.

Does this throttle body include an Idle Air Control (IAC) valve?

Yes, this throttle body is designed to work with an Idle Air Control (IAC) valve. This allows for precise control of idle speed, which is important for maintaining a stable idle, especially in EFI systems.

Can this throttle body be used on a vehicle registered in California?

No, this throttle body is not CARB approved and cannot be legally shipped to or used on vehicles registered in California due to emissions regulations.

FAST 4500 Series Throttle Body 307604 - Red

Name: FAST Throttle Body 4500 W/IAC
Brand: FAST
SKU: fast-fast-throttle-body-4500-w-iac-t14-4388570
Price: 1162.88 USD
Availability: BackOrder

FAST Throttle Body 4500 W/IAC

$1162.88

On Backorder

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

FAST 4500 Series 4-barrel throttle body for EFI systems. Red finish, 2000 CFM airflow. Part# 307604. Not CARB approved.

Key Features

Fits 4500 series flanges and is designed for multi-port injection EFI systems.
Rated for 2,000 CFM of airflow to support high-performance engines.
Features tapered and radiused throttle bores for improved air entry.
Inward opening throttle blades and a shorter height contribute to better airflow and easier packaging.
Includes provisions for an Idle Air Control (IAC) valve for stable idle operation.
Has a red finish for a custom appearance.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Product Details

If you're building a high-performance EFI system for your race car or serious street machine, getting the right amount of air into your engine is critical. This FAST 4500 Series throttle body is designed to handle serious airflow, helping you unlock more horsepower. It's built for multi-port injection EFI systems and features a red finish for a custom look under the hood.

This throttle body is engineered to move a lot of air, rated at 2,000 CFM. The bores are tapered and radiused, and the throttle blades open inward to help improve airflow dynamics. This design, combined with a shorter overall height, not only aids in better airflow but also makes it easier to package in tight engine bays, especially when hood clearance is a concern. The progressive linkage ensures smooth throttle operation, so you get predictable response when you need it most. It also includes provisions for an Idle Air Control (IAC) valve, which is essential for maintaining stable idle speeds.

Please note that this throttle body is not CARB approved and cannot be shipped to California. It's a solid choice for performance builds where maximum airflow and precise fuel delivery are the top priorities.