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The GFB Respons blow-off valve kit for 2004–2005 Mazda Miata and 1993–1998 Toyota Supra (requires modification of factory hoses) lets you tune how much air recirculates or vents to atmosphere. Its patented venting-bias adjustment ring provides infinite control between silent recirculation and full atmosphere venting while TMS technology preserves rapid boost recovery, throttle response and high boost resilience.
GFB 04-05 Miata / 93-98 Supra (w/ modification of factory hoses) TMS Respons Blow Off Valve Kit
