No need for engine removal

models with the 4453 upper tree bolt & 4350A clamping screw system)

Fits: > 29-73 45" (750cc) Flathead

2017 M8 Touring)

Fits: > 91-05 Dyna

Piston Hasting Rings Shovel 80" 1978-83 Top End Parts Twin Cam No need for engine removalStd cyl. bore: 3. 498" (88. 85mm). 1st ring: 1. 6mm. 2nd ring: 1. 6mm. oil ring: 4. 75mm. Tech tip: Piston grooves vs piston rings. It's not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings, the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3 piece flex