Perrin [02-07 WRX, 04-21 STI] Recirculating Blow off Valve Red

PERRIN Recirculating Blow Off Valve

The PERRIN Recirculating Blow Off Valve (BOV) is designed to provide faster and more reliable boost pressure relief for modified Subaru WRX and STI models. If you’ve increased your vehicle’s boost, horsepower, or overall performance, this upgraded BOV responds quicker and more precisely than the OEM unit, protecting your turbo and improving throttle response.

Crafted from CNC-machined 6061 billet aluminum, the BOV body is machined from a single block, eliminating leak-prone bolt-on pieces. The cap, piston, and flange are also billet aluminum for maximum durability and precision.

An adjustable spring cap lets you fine-tune the release pressure independently of the blow-off volume. Loosening the cap provides a smoother, lighter boost release for mild setups, while tightening it suits higher boost pressures. Adjusting the volume controls how much air is vented, allowing you to prevent turbo damage from insufficient venting or poor throttle response from excessive venting.

Maintenance is simple—disassembly requires no special tools and the valve is easy to service when needed.

Key Features:

• CNC-machined 6061 billet aluminum body, cap, piston, and flange

• Adjustable spring cap for customizable boost release pressure

• Independent adjustment of air release volume

• Single-piece body design reduces potential leaks

• Quick response to increased boost pressure from performance upgrades

• Simple disassembly and low maintenance

What’s Included:

• (1) PERRIN WRX Recirculating Blow Off Valve

• (1) 1/4” vacuum hose

• (1) 1/4”-to-1/4” hose connector

• (1) Zip tie

Fitment:

• Subaru WRX/STI models (typically fits 2002+ WRX and STI, verify specific compatibility)

Installation:
Difficulty: ★★☆☆☆
Time: Approximately 30–60 minutes
Tools Needed: Basic hand tools
Notes: Includes all necessary hardware and hoses for plug-and-play installation

Warranty:
Manufacturer Warranty

PROPOSITION 65 WARNING:
Cancer and Reproductive Harm
www.P65Warnings.ca.gov