The Mahle chrome ring set specified for a 4.187 inch bore includes 48 rings in bulk and lists a 3/16 inch end gap with CP20 oil rings and high-tension chrome construction. Supplied as an OE-style bulk pack, this set is intended for engine rebuilds and machining jobs where those specific bore and ring dimensions are required. It’s a straightforward option for shops needing standard replacement ring components in quantity.
Mahle Rings 4.187in Bore Dia 3/16in EW CP20 Oil Ring High Tens. Chrome Ring Set (48 Qty Bulk)