AudiTTMk1>150/180BHPIntakePressureCompensationValve

We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes soonerA blow off or recirculation valve (be it piston, diaphragm or OEM) will be activated by vacuum or electricity, and is designed to improve the drivability of your vehicle giving you maximum power when you want it. All types rely on an internal spring in order to maintain a seal so that you have boost pressure when it is needed - If the spring is too weak, you lose power.Previously, when an engine was