Wiseco 82.5mm Ring Set Ring Shelf StockWiseco 4 stroke piston ring sets are made specifically to Wiseco's specifications to provide ultimate performance and sealing with Wiseco's wide variety of 4 stroke pistons. From compression and sealing to oil control, rings can make or break piston performance, which is why Wiseco rings are developed and tested for race ready performance. This Part Fits: Year Make Model Submodel 1997 2005 Audi A4 Base 2003 2006 Audi A4 Cabriolet 1999 2005 Audi A4