Speed Pro Speed Pro Piston Hypereutectic 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc R030015XXL Ester base stocks and friction

Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears

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

Drop mount brackets position the shock approximately 2-1/2" below the chassis tubing

Will work on all Cast Aluminum GM HEI distributors

Accepts 3/4"

Speed Pro Speed Pro Piston Hypereutectic 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc R030015XXL Ester base stocks and frictionProduct 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