Speed Pro Speed Pro Piston Hypereutectic 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc R030015XXL Accepts 3/4"

Accepts 3/4"

and can be used individually or stacked without the use of gaskets

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

Will work on all Cast Aluminum GM HEI distributors

Fits Most Domestic Stock Wheels (GM & Ford OEM Wheels)

Speed Pro Speed Pro Piston Hypereutectic 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc R030015XXL Accepts 3/4"Product 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