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 Accurate and maintenance-free magnetic pick-up

Accurate and maintenance-free magnetic pick-up never needs adjustment

The oil pump screen O-ring is included

Includes adapters for installation on most popular vehicles foreign and domesticFor decades

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

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 Accurate and maintenance-free magnetic pick-upProduct 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