Mahle OE chrome ring set in Performance Grey Iron (BT-10UF), 4.0551 in with 2.0 mm top ring thickness and .178 in RW, is offered here in a 48-piece bulk pack. These chrome rings are intended for piston assembly work that requires multiple identical sets, making the bulk pack convenient for batch engine rebuilds or shop inventory where the exact 4.0551 in sizing is specified.
Mahle Rings Perf Grey Iron BT-10UF 4.0551in x 2.0MM .178in RW Chrome Ring Set (48 Qty Bulk Pack)