VALVE SPRING COMPRESSOR, STUD MOUNT SUIT 3/8" & 7/16" STUDS Category_RETURN SPRINGS & ASSEMBLIES These Aeroflow header bolts are

These Aeroflow header bolts are made from Grade 8 steel for strength

000 psi tensile strength to provide a substantial extra margin of safety over Grade 8 hardware

If you are using heavy weight oil (20W to 60W) we recommend to purchase the AF59-2016-60 which is a 60 micron

Wall thickness: 1/8" (3mm)

VALVE SPRING COMPRESSOR, STUD MOUNT SUIT 3/8" & 7/16" STUDS Category_RETURN SPRINGS & ASSEMBLIES These Aeroflow header bolts areValve Spring Compressor Stud Mount Suit 3 8" & 7 16" Studs For all 3 8" and 7 16" Rocker Studs. Remove valve spring from an assembled engine for checking or replacing quickly and easily. Press down to compress coil spring, then remove valve keepers. Release slowly. PR66784