Speed Pro Speed Pro Piston Hypereutectic 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc R030015XXL These 120 grit rolls are

These 120 grit rolls are 3/8" x 1 1/2" long

Accepts 3/4"

Specially designed to resist to extreme temperature generated by racing carbon and ceramic brakes allowing minimizing air entrance for brake cooling

Will work on all Cast Aluminum GM HEI distributors

Panhard bars and upper links can now be quickly adjusted with a wrench

Speed Pro Speed Pro Piston Hypereutectic 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc R030015XXL These 120 grit rolls areProduct Description: Piston Speed Pro Hypereutectic 4. 030 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 6. 90 cc Coated Skirt Small Block Chevy Set of 8 From pistons to engine bearing components, Speed Pro offers an array of performance engine parts. You can rely on Speed Pro for industry leading performance engine technologies, from cutting edge Digital Diamond Profiled pistons to A Series bearings. They are engine components performance