GFB 91-98 Nissan Silvia / 90-96 Nissan 300ZX (requires 2 kits) TMS Respons Blow Off Valve Kit

This is the Go Fast Bits TMS Respons Blow Off Valve Kit, part number T9035. It's a well-built adjustable blow-off valve designed to work with a range of turbocharged vehicles, including popular models like the Nissan 300ZX, Mazda 626, and Subaru Impreza. If your car typically experiences issues like backfiring or stalling when using a fixed-atmosphere venting BOV, this valve can help by letting you adjust how much air is recirculated versus vented to the atmosphere.

What makes the Respons unique is its patented venting bias adjustment. You can infinitely change the valve's behavior from fully recirculating (silent operation) to fully venting to atmosphere (loud sound) just by twisting the adjustment ring. This means you can get the blow-off sound you want without the drivability problems. Like all GFB valves, it uses their TMS Technology to ensure quick boost recovery after shifts and good throttle response, and it's built to handle boost pressures up to 100psi, which is more than most turbos can produce.

Keep in mind that for some applications, like the Nissan 300ZX, you might need two kits to cover all the necessary connections. Also, this part is not CARB approved and cannot be shipped to California.