Speed Pro Hypereutectic Piston 4.060" Bore 5/64 x 5/64 x 3/16" Ring Grooves Plus 12.3 cc - Coated Skirt M59XX1 One other new feature is

One other new feature is our internal comfort lace up system requiring less space and lowering the bulk on the top of the foot thus increasing comfort

They are made of cast iron and install into the exhaust crossover without any modifications

Vehicle Applications: 1967 thru 1971 Pontiac Cars 7

Convoluted bumper prevents shock from bottoming out

Speed Pro Hypereutectic Piston 4.060" Bore 5/64 x 5/64 x 3/16" Ring Grooves Plus 12.3 cc - Coated Skirt M59XX1 One other new feature isProduct Description: Piston Hypereutectic 4. 060 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 12. 30 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 enthusiasts and