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These are the dished pistons from 440Source I used on my 493 to drop comp from over 11.2 down to 10.6 with Indy EZ heads. Has good quench and runs fine on 92 pump. Ron



Those type of pistons are commonly refer to as "reverse dome piston" or a half dish piston,they make good quench if the deck hieght is set correctly

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)