COMP Cams Seat Spacer BB Chevy Exhaust .300" Thickness Header Bolt 2A/5 & FIA 8856-2018 Certified

2A/5 & FIA 8856-2018 Certified

1982-1985 Oldsmobile Toronado

XRP AN ORB-(O-Ring Boss) Adapter Fittings are what you need to connect AN fuel lines to AN ORB ports of the same size

1961-1962 Chevrolet P10 Series

ASN Series Shocks

COMP Cams Seat Spacer BB Chevy Exhaust .300" Thickness Header Bolt 2A/5 & FIA 8856-2018 CertifiedLate model Big Block Chevrolet engines are originally equipped with exhaust valve rotators. Until now, the only way to make up for the rotator was to stack . 300" of shims under the spring. This was sloppy but also did not fit as well as these seat spacers. These will locate the spring with an outside step so the spring cannot "walk" around on the head. Avoid stacking . 300" of shims under the valve springs on your Big Block Chevrolet with our seat