KB Performance Pistons Hypereutectic Flat Top Piston and Ring Set - 4.040 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 7.00 cc - Small Block Chevy CNX97102-X12 670 in Long

670 in Long

063" aluminum in two styles for Holley(R) 5-1/8" and 7-5/16" Dominator carburetors

1962-1968 Ford Galaxie 500

Gasket is NOT included with the master cylinder cover

KB Performance Pistons Hypereutectic Flat Top Piston and Ring Set - 4.040 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 7.00 cc - Small Block Chevy CNX97102-X12 670 in LongProduct Description: Piston and Rings Hypereutectic Flat Top 4. 040 in Bore 1. 433 in Compression Height 5 64 x 5 64 x 3 16 in Ring Grooves Minus 7. 00 cc Small Block Chevy Keith Black pistons have several important advantages over conventional alloy pistons. KB Hypereutectic Pistons high silicon content yields superior thermal and wear characteristics, greater strength, scuff and seizure protection, and resistance to cracking. High silicon content