Ls7 4.145 bore, 1.240 cd , 9cc dish, 1.5 x1.5 x3mm ring pack
Will not work with factory crank
Need a 3.75 stroke and a 6.125 aftermarket rod
These are custom pistons not a standard part number
Note. 1 piston has some imperfections on the top. Skirts and ring lands are good