APR Valve Spring Kit | MK2 TT RS C7 RS7 4.0L Turbo V8 This is a direct replacement

This is a direct replacement filter for all IE cold air intakes with a 5" velocity stack on the heat shield

For everyone else

thanks to our billet turbo inlet adapter

Computational Fluid Dynamic (CFD) optimized

Integrated Engineering valve guides are designed to directly replace OEM valve guides

APR Valve Spring Kit | MK2 TT RS C7 RS7 4.0L Turbo V8 This is a direct replacementThe APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve float common on many applications. APR's design specifications called for a valve spring, retainer and spring seat combination that doesn't overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control. The result is an advanced design that's 28% lighter yet 20% stiffer