GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit

GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit

Marsoni

M251S

$160.43

Get it in 3 business days with 1 day shipping. Friday, May 29

GFB 99-00 WRX/STI TMS Respons Blow Off Valve KitIf cars like yours typically suffer issues such as backfiring and stalling when using a fixed ratio atmosphere venting BOV, the Respons can help. By adjusting the venting bias to suit the car you can achieve a blow off sound without having to put up with the issues. Like all GFB valves, the Respons utilises GFB's proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost

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Your GFB 99-00 WRX/STI TMS Respons Blow Off Valve Kit orders ship within 1-2 business days.

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These are quite nice and also sturdy. Only complaint I have is that I bought a couple of these, and on one of them, only one of them, it was difficult to get the hidden mounts to go into the holes. I think it was probably a manufacturing defect thing. Also, on that particular one, it wasnt as level as the other. Not a show stopper, but if you need a perfectly level type of mounting situation, I would be careful here.

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Reviewed in the United States on September 14, 2025

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NatKenneally

West Palm Beach, US

★★★★★ 5

Great value/easy to install.

Size: 24x6 2Pcs, Color: Black, Size: 24x6 2Pcs, Color: Black

Great product and great value. Easy to install and adds a nice touch to a bathroom.

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Reviewed in the United States on March 21, 2026

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