21528-RS-8 Diamond Pistons Chevy LS2K 12° Forged Flat Top 4.065 Bore

Diamond Pistons are some of the best aftermarket pistons on the market. Trust your new engine with a set of Diamond Pistons
Diamond LS2K LS7 12 degree forged flat top pistons are rated to support 2000 horsepower. Diamond LS2K Pistons feature 3D milling on the piston crowns for ready to install finish. LS2K Piston feature inboard forging design with fully machined under crown for maximum strength. Valve pockets are designed to work with most all LS7 12-degree cylinder heads. Side gas ports are added for better ring seal along with Moly skirt coating for friction loss and skirt wear protection. Top ring is down .280 on (1.115cd) and .250 on (1.053cd) pistons. Premium steel 1.5mm top ring, 1.5mm napier second, with standard tension 3.0mm ring package included. Premium H-13 .225 wall wrist pins included and chamfered for round wire locks included. Valve pocket depth .220 Intake and .162 on the Exhaust. Compression ratios are figured using .053 head gasket. Diamond LS2K Pistons are 2618 material and are designed for HP-NOS-Boost applications, Rated for 2000 HP

Compression Ratio:

68cc 10.9:1

70cc 10.7:1

72cc 10.5:1