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Integrated Engineering valve guides are designed to directly replace OEM valve guides
keeping the cross-sectional area as large as possible is the key to the pipe's performance gains
8T 06A block engines
This is a direct replacement filter for all IE cold air intakes with a 5" velocity stack on the heat shield
APR Valve Spring Kit | MK2 TT RS C7 RS7 4.0L Turbo V8 Integrated Engineering valve guides areThe 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
