GFB T9000 Diverter / Blow off Valve Fits Subaru Impreza ST 99 - 00 rear diffuser extension Signature Double Red Stitching

Signature Double Red Stitching

so you move more air and get more bass

that’s EXACTLY what we mean

Bass boost adjustable +12 dB (45 Hz)

Installation is as simple as connecting a couple of hoses

GFB T9000 Diverter / Blow off Valve Fits Subaru Impreza ST 99 - 00 rear diffuser extension Signature Double Red StitchingRESPONS TMS : SMARTER THAN A DUAL PORT BLOW OFF VALVE Atmosphere venting BOV wont work on your car? Try a GFB Respons youll be surprised! Just another dual port BOV? On the surface, it may look like just another dual port blow off valve, but the Respons is actually much more than that. Featuring GFBs venting bias adjustment system, the Respons allows you to precisely control how much air vents from each of the two outlets. Why is this so important?