Piston - AutoTec - Forged - Dished - 4.010 in Bore - 1.5 x 1.5 x 3.0 mm Ring Grooves - Minus 10.00 cc - GM LS-Series - Set of 8 Vendor- RACE TEC PISTONS MPN 1000627 State Restrictions Canada Restrictions - NO Notes: 15-Degree 4.000 Stroke 6.125 Rod 1.110 CH AutoTec Series