Check the listing for details. Vtwin 80" Front & Rear Cylinders Jugs & Piston Kit for 1978-84 Harley Shovelhead. Condition: New. Listed at 458.95 USD. Vtwin 80" Front & Rear Cylinders Jugs & Piston Kit for 1978-84 Harley Shovelhead SKU: 11-049611-049711-0226 Brand: Vtwin Condition: New Warranty: No Manufacturer Part Number: 11-0496 11-0497 11-0226 Replaces OEM: 16498-80A 16499-80A NEW V-TWIN 80" SHOVELHEAD FRONT AND REAR CYCLINDERS AND 80" PISTON SET VT No: 11-0496 OEM No: 16498-80A Front cylinder fits Shovelhead 1979-1985 80" models. Cylinders are for stock bore, stock stroke and compression. Cylinders are 88.86mm bore with + or - .005mm range of tolerance. Cylinders must be honed to standard size for proper fit. Sold each. Piston is not included.VT No: 11-0497 OEM No: 16499-80A Rear cylinder fits Shovelhead 1979-1985 80" models. Cylinders are for stock bore, stock stroke and compression. Cylinders are 88.86mm bore with + or - .005mm range of tolerance. Pistons are not included. Cylinder has a hole in the base.VT No: 11-0226 Replica 3-1/2" bore piston set has 8:1 compression ratio and is standard size. Piston set includes Hasting rings, 2 wrist pins and 4 circlips. Pistons have a steel expansion control strut cast. **Note:Run engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears, in order to properly break-in new pistons and rings. Proper Installation of any Evolution Big Twin or Sportster piston that is not marked with arrows.All Evo pistons have wrist nore that are offset in the piston for proper loading durring operationTo determine the correct way to install a non marked piston Measure from wrist pin bore to back edge of piston Measure from wrist pin bore to front edge of piston The shorter distance of the two goes to the back of the motor.procedure is the same for both front and rear pistonFits: FL 1978-1984 FLT 1979-1983 FXR 1982-1983