Piston - Premium Forged - Forged - 4.030 in Bore - 1.2 x 1.2 x 3.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Set of 8

Piston - FHR - Forged - 4.030 in Bore - 1.5 x 1.5 x 3.0 mm Ring Groove - Minus 3.30 cc - GM LS-Series - Set of 8

Piston and Ring - Premium Forged - Forged - 4.005 in Bore - 1.2 x 1.2 x 3.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Kit

Piston and Ring - Premium Forged - Forged - 4.010 in Bore - 1.2 x 1.2 x 3.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Kit

Piston and Ring - Premium Forged - Forged - 4.030 in Bore - 1.2 x 1.2 x 3.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Kit

Piston and Ring - Professional Series - Forged - 4.030 in Bore - 1.2 x 1.2 x 3.0 mm Ring Groove - Minus 20.00 cc - GM LS-Series - Kit