Type RS Valve - Recirculating Best selling It has been designed to

It has been designed to instantly give your BMW an under-bonnet boost in the aesthetic department

Upgrade your failure-prone PCV breather hose with the high-performance

High-flow aluminium charge pipe with CNC leak-free connection c-clip

Forced induction (compression of inlet air) produces heat

Type RS Valve - Recirculating Best selling It has been designed toWe recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner The Forge RS valve has been specifically designed and engineered, to offer extreme flow rate capability, where other valves are just not up to it. Often when engines have been tuned by installing larger turbos or even software upgrades improved turbo response can be acheived by fitting the RS valve which has the greater internal mass air flow specification