Engine Parts Piston Rings Set 103mm STD Fit 6.1 L For Cherokee 300 Charger ESF 6.1L V8 GAS 05-10 2M4907 Piston rings set with standard bore diameter of 103.00mm designed for engine rebuild, repair, and maintenance.Specifications include 1.50mm for the first ring group, 1.50mm for the second ring group, and 3.00mm oil ring.Matches OE dimensions for proper fitment.Designed for use in vehicles equipped with ESF 6.1L V8 engines.Compatible with: - 300 6.1L 6059CC 370CID V8 OHV 2005–2010 - CHALLENGER 6.1L 6059CC 370CID V8 OHV 2008–2010 - CHARGER 6.1L 6059CC 370CID V8 OHV 2006–2010 - CHEROKEE 6.1L 6059CC 370CID V8 OHV 2006–2010 Replaces part numbers: 2M4907, 2M5378, 42089CP, 5159661AA