New Authentic GFB Go Fast Bits Hybrid dual port blow off valve upgrade kit for 2004-2021 Subaru WRX STi 2.5 turbo. Made in Australia, sealed in original GFB box. Known as the ?. The Hybrid then went on to evolve into GFB's next world-first, the venting bias adjustable BOV now known as the Respons TMS, and then to the electronically adjustable version, the Deceptor Pro.
