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The GFB Respons blow-off valve kit lets you adjust how much intake air is recirculated or vented to atmosphere via a twist-adjustment ring, ranging from silent recirc to loud atmospheric venting. It uses GFB's TMS technology for rapid boost recovery and improved throttle response, holds boost well above typical levels, and fits Nissan Silvia (1991–1998) and Nissan 300ZX (1990–1996; 300ZX requires two kits).
GFB 91-98 Nissan Silvia / 90-96 Nissan 300ZX (requires 2 kits) TMS Respons Blow Off Valve Kit
