Forge Piston Recirculating Valve BOV for 04+STi (FMDVSUB03) Stepper Motor Gauge 866" / 22mm Pin Bore

866" / 22mm Pin Bore Size: 85

8" 15% underdriven

silver bezel/white gauge option sold separately

The Radium Engineering coolant header tank also has an internal swirl feature

Forge Piston Recirculating Valve BOV for 04+STi (FMDVSUB03) Stepper Motor Gauge 866" / 22mm Pin BoreForge Motorsport recirculating blow off valve for 2002 2007 WRX and 2004 2021 STi. Made from billet aluminium, this recirculating diverter valve dumps the charge air back into the air intake system keeping external noise to a minimum. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably. Vehicle Fitment: 2002 2007 Subaru WRX 2004 2021 Subaru STi Includes: 1 x FMDVSUB03 Valve 1 x Forge Sticker