Mahle MS forged piston set for 488cid engines lists a 4.155in bore, 4.500in stroke and 7.100in rod in a set of eight pistons. The extended spec cites a 1.260cc crown height, 0.990in wrist pin and a roughly 10.0:1 compression ratio. These pistons are specified by Mahle for builders needing the exact bore, stroke, rod and compression dimensions when assembling a 488cid engine package.
Mahle MS Piston Sets 488c.i. 4.155bore 4.5stroke 7.1rod 1.26c/h 0.990pin -22ccvol 492g 10.1c/r 4032