GM LS F/T Piston Set w/Rings 3.905 Bore

Piston and Ring - Forged - 3.905 in Bore - 1.5 x 1.5 x 3 mm Ring Grooves - Minus 2.70 cc - GM LS-Series - Kit -2.7cc, 3.622 Stroke, 6.125 Rod Length, 1.5x1.5x3.0mm Rings. CP-Carrillo Bullet pistons are designed specifically to fit all LS 15° heads. Pistons are proudly made in the USA from 2618 forgings and are suitable for nitrous oxide Superchargers or Turbos. Pistons feature special skirt design for low piston noise, 1.5mm steel gas nitride top ring, 1.5mm Napier second ring, 3.0mm oil ring and include .945 x 2.250 or .927 x 2.250 pins with .180 wall standard. Compression Ratio w/ 70cc Head 9.6:1.