The race pistons will be forged or billet 2618 aluminum alloy.They are nothing like that Arias.That piston from Arias is a real oldie.Same blank in use by Forgetrue and they disappeared in the 70's.Super heavy too. Minimum clearance at least .007-.008

Last edited by mike s; 12/27/14 04:54 AM.
Leave the gun.......take the Cannoli's....Mike