The Mahle OE CP20 chrome piston ring set (STD tension, 3.0MM oil rings, 4.155in bore) is a replacement ring pack sized for engines needing 3.0mm oil rings at that bore diameter. These chrome rings are supplied for piston rebuilds and service work where correct ring dimensions are required to restore piston sealing and control oil at the ring area during normal engine operation.
Mahle Rings CP20 Std Tension 3.0MM Oil Rings 4.155in Bore Chrome Ring Set (48 Qty Bulk Pack)