CATEGORIES HOMEBriggs and Stratton EnginesFlathead EngineAftermarket PartsPistons 2.815 Wiseco Ring Set Item Number: 2815XM Price: $24.84 Add to Cart Description The 2815XM Wiseco Ring Set is a +.253" over standard flathead Briggs bore. This ring set features a chrome-faced top ring and a 3-piece oil ring design. It is intended for use with the 1982P253 and 1982P253-C pistons. Accessories Wiseco Lightweight Wrist Pin Wrist Pin with Circlips, Old Style, Flathead Wiseco Piston Circlips Wiseco Piston 2.8155 X .640, Unchromed, Thick Dome Wiseco Piston 2.8155 X .540, Unchromed, Cut Dome