Mahle MS Piston Set BBC Mar 509ci 4.50in Bore 4in Stroke 6.135in Rod 0.990 Pin -3cc 9.0 CR Set of 8

BIG BLOCK CHEVY 502 MARINE "DROP IN" REPLACEMENT 509cid 4.500 x 1.645CH, 4.000stroke,6.135rod,0.990pin,-3.0cc,661g,8.9CR, 4032.