Piston and Ring - PowerPak - Forged - 4.010 in Bore - 1.0 x 1.0 x 2.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Kit

Piston and Ring - PowerPak - Forged - 4.065 in Bore - 1.0 x 1.0 x 2.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Kit

Piston and Ring - PowerPak - Forged - 4.070 in Bore - 1.0 x 1.0 x 2.0 mm Ring Groove - Minus 4.00 cc - GM LS-Series - Kit

Piston and Ring - PowerPak - 4.075 in Bore - 1.0 x 1.0 x 2.0 mm Ring Groove - Minus 5.8 cc - GM LS-Series - Kit

Piston and Ring - LS7 Flat Top PowerPak - Forged - 4.135 in Bore - 1.0 x 1.0 x 2.0 mm Ring Groove - Plus 2.50 cc - GM LS-Series - Kit

Piston and Ring - PowerPak F/T - Forged - 4.125 in Bore - 1.0 x 1.0 x 2.0 mm Ring Grooves - Minus 2.50 cc - GM LS-Series - Kit