Custom sbc 18* Diamond piston and Callies ultra xd i beam rods. Pistons are 4.165 bore gas ported ultra thin ring pack .9/.9/2.0 (I used total seal) +5cc dome the skirts have been coated. Comes with Diamond h-13 pins .185 wall and the wire locs. The rail spacers are still on pistons. I've run this piston and rod for 2 seasons now. The rods are ultra xd I beams .050 more cam clearance. .927 pin end 2.100 on crank side. 6.00 long. Installed new original equipment arp ultra bolts last season. This rod retails @ summit for real close to 2k and I have 1300 in the piston. If no one buys them I'll be using both over again in new block. I will ship ups to your commercial address @ your expenses. 18* Top end package is listed as well.