LS1 RPM Speed Heavy Duty Drop In Pistons

Drop in Heavy Duty pistons for your LS1. Uses stock rings, rods and pins. Comes with coated skirt and new pins. Press fit design.

Please Note: Will not work on Gen4 or floating pin rods. IF YOU NEED FLOATING PIN FOR GEN4 OR FORGED RODS, CHOOSE OPTION BELOW. THE STANDARD OPTION WILL NOT WORK FOR GEN3 PRESS FIT RODS.

Available in stock 3.898 and 3.908 bore sizes. Flat top with no valve relief. Also a great upgrade for 4.8/5.3 blocks building an iron 5.0 with 4.8l crank and rods or an iron 5.7 with 5.3l crank and rods.

Optional Rings: Rings are moly coated steel top and 2nd with std tension oil ring. Standard Fit no filing needed.