Piston - AutoTec - Forged - Flat Top - 4.030 in Bore - 1.5 x 1.5 x 3.0 mm Ring Grooves - Minus 14.30 cc - Small Block Mopar - Set of 8 Brand-RACE TEC PISTONS MPN 1000556 . **NOTE: 3.580 Stroke 6.123 Rod Length 1.667 CH AutoTec Series Truck Freight NO