Go Fast Bits 99-00 WRX/STI TMS Respons Blow Off Valve Kit - T9000Find parts that fit my vehicle

If 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 pressures of 100psi+. Put simply, it can hold more boost than any turbo could produce.

Forced induction components mainly consist of supercharger or turbocharger parts that are used to make significant power gains on your vehicle. If you are looking for a significant increase in horsepower, look no further than forced induction.

Blow off valves are designed to relieve the boost pressure from your intercooler piping when you let your foot off the gas. Doing so, the blow off valve protects your turbo from early wear and tear. Aftermarket blow off valves allow for proper pressure relief and often make cool sounds.

From the very beginning of my career, I've learnt that it's amazing where tinkering can take you.

I've been engineering for 35 years, including 10 years manufacturing components for the automotive market including Original Equipment Manufacturers (OEM). I've been determined to push the limits of high performance engines since I was tinkering with my Mini Cooper S in the '80s.

When I bought my WRX in 1997, I decided to step it up a knotch and get serious. At first, I bought components 'off the shelf'. Most of these were expensive and imported. Indeed, this was true for the Australian-made ones too. Nothing, however, came even close to the quality I knew they should be, as they were made of inferior materials and of generally poor workmanship, and did not give me the performance gains I was looking for.

So I started designing, testing and developing "GO FAST BITS", a range of innovative and high-quality blow-off valves, boost controllers, pulley kits and short shifters. These products, unlike what was previously available, were meticulously designed and manufactured from the highest grade materials, working the way they were designed to.

Performance should not be about compromise - parts should fit correctly and deliver real performance outcomes, without making the car difficult to live with on a daily basis. GFB now has three qualified engineers (mechanical and mechatronic), and a team of dedicated enthusistic & passionate individuals who make the GFB name what it is today.

"GO FAST BITS" products are Proudly Australian, made in accordance with the ISO 9001 quality management system. Constantly we're developing new, and innovative products.

Keep an eye on the website for the latest of GFB's innovations.