Speed Pro Hypereutectic Piston - 4.030 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 5.00 cc - Coated Skirt - Small Block Chevy - Set of 8 H631CP30 351022 Detroit Locker Differential 187C145A 31

Detroit Locker Differential 187C145A 31 Spline - 1

9 High Grade steel bolts (equal in strength to American Grade 8)

UHF males antenna connector

Lightweight aluminum frame features guide "ramps" to reduce balance bar tipping

They are made from reinforced synthetic Chlorinated Polyethylene rubber hose with a nylon inner braid for strength

Speed Pro Hypereutectic Piston - 4.030 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 5.00 cc - Coated Skirt - Small Block Chevy - Set of 8 H631CP30 351022 Detroit Locker Differential 187C145A 31Chevrolet Small Block Sophisticated "barrel" profiles help optimize oil wedge between skirt and wall. Piston skirts protected by next gen DUROSHIELD coating. TAC ring groove geometry Weight matched to + 2 grams. Machined valve reliefs and circlip grooves; LR 63 lock rings for floated applicationsFrom pistons to engine bearing components, Speed Pro offers an array of performance engine parts. You can rely on Speed Pro for industry leading performance