PERRIN Recirculating Blow Off Valve Red - 2002-2007 Subaru WRX / 2004-2021 STI PDM_dress-up-caps

PERRIN Recirculating Blow Off Valve Red - 2002-2007 Subaru WRX / 2004-2021 STI PDM_dress-up-capsPERRIN Recirculating Blow Off Valve Red Features: Red anodized finish Adjustable relief pressure for easy tuning 1. 225" inlets outlets prevent compressor surge Customizable spring tension for smooth or aggressive venting Adjustable flow control to balance boost and throttle response Recirculates air to maintain proper air fuel ratio Low maintenance with simple disassembly Direct fit for WRX STI, no modification needed CNC machined 6061 billet

HKS has taken their time to design a free flowing exhaust that sounds great

This intake provides power you can hear

Compression ratio: 9

Prevents harmful oil and vapors from coating the intake system with carbon that is common in these Subaru boxer engines

and accessories

Quiet operation

Strut Towers

Specially designed and calibrated flow benches utilizing digital flow meters which are required to measure the precise fuel mass needed for proper characterizations

Offset: +38mm

Made from durable polyurethane for high-performance temperatures

cold air is sucked in past the sidewall of the PCB to exchange heat and is blown out the opposite side of the bulb

650cc injector size