Boomba Racing STI 75mm DBW Bolt On Throttle Body (Natural Aluminum) - 2004-2021 Subaru STI

Boomba Racing STI 75mm DBW Throttle Body (Bolt On) - Natural Aluminum - 2004-2021 Subaru STI

The WRX / STI 75 MM Drive-By-Wire Throttle Body serves as a direct replacement for the factory unit and is engineered to function only with the original TPS cover and servo motor from the OEM bolt-on assembly. It is designed to fit 2004.5–2014 STI models equipped with a drive-by-wire throttle body, ensuring compatibility while retaining factory electronic components for proper operation.

 

Features and Performance

This throttle body kit includes a stock manifold adaptor plate, 60 MM hose adaptor for immediate use with stock intake pipes, a 75 MM hose adaptor, and all necessary mounting hardware. Manufactured from billet aluminum using CNC machining, it is available in natural aluminum as well as red, blue, and black anodized finishes. Expanding the diameter to 75 MM results in nearly a 56% increase in throttle cross-section compared to stock, providing faster throttle response and small horsepower gains even on standard setups. When combined with larger 75 MM intake piping, this upgrade creates significant performance potential and is backed by Boomba’s high-quality craftsmanship and warranty.

 

DETAILS:

• Direct factory replacement

• Fits 2004.5–2014 STI (drive-by-wire)

• Requires factory TPS cover and servo motor

• Includes manifold and hose adaptors with hardware

• CNC-machined billet aluminum construction

• Multiple anodized finish options

• 56% larger throttle cross-section than stock

• Boosts response and performance capability