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Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
Billet steel construction
Fully threaded body for adjusting vehicle lowering
Adding the optional cast turbo inlet upgrade further reduces significant air restrictions while maintaining the largest size possible from the airbox to the turbocharger
Rev limiter increased to 7000RPM (automatic trans limited)
APR Valve Spring Kit | 42 R8 · 4S R8 | 5.2L V10 B8 Q5 (8R) 3.0L SC V6 Billet steel constructionThe 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
US$ 283.28
US$ 150.51
US$ 190.47
