Apr Valve Spring Kit (1 Set)-MS100258 emission-systems Brand ACCEL Emission Code 2

Brand ACCEL Emission Code 2 GAP n/a Heat Range 1 Step Colder Hex Size 9/16" Length Standard Product Type Spark Plug Projected Tip No Qty 8 Reach

4 V8 1991 - 2000 GMC C3500HD 454/7

Year Make Model Submodel Engine Size 2001 - 2005 Chevrolet Silverado 2500 HD 4

Gasket Emission Code 5 Engine Chevrolet Small Block Gen II (LT Based) Packaging Retail - Skin Pack Product Type Valve Cover Gaskets Valve Cover Gasket Material Performance Valve Cover Gasket Thickness

Apr Valve Spring Kit (1 Set)-MS100258 emission-systems Brand ACCEL Emission Code 2The 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