Tru Power Engine Kit. 4-Cylinder Gas, 113 CID, 3 inch Standard Bore, 3-1/8 inch Overbore Supplied. Flat-Head Standard Compression Piston, Cylinder Sleeve 3-5/16 inch O.D. at Seal, 4-25/32 inch Valve Length. Basic In-Frame Kit. Contains sleeves, sleeve seals, pistons & rings, pins & retainers, valve-grind gasket set, oil pan gasket. For A Series, B Series, BN Series, Super A Series, Super AV Series, C Series.