Atmospheric Dump Valve for Audi S4 B9 and Audi S5 B9 Colour:Anodised Black The problem is that diaphragm

The problem is that diaphragm retaining ring is made from very thin plastic that goes brittle with heat cycles

Designed to improve original ignition system performance on road vehicles using either electronic engine management systems or carburetors

1xSPF3350K

ASV (110bhp)

NO check engine lights

Atmospheric Dump Valve for Audi S4 B9 and Audi S5 B9 Colour:Anodised Black The problem is that diaphragmWe recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner Forge Motorsport Atmospheric blow off valve for the Audi S4 B9 and Audi S5 B9 This product is a solenoid operated valve that integrates seamlessly with the OEM electronics resulting in absolutely no fault codes, no check engine lights, and no detriment to the performance of the vehicle in any way. These valves, designed and manufactured by Forge are engineered to