Fits: > Customs with internal throttle

Fits: > 56-90 4-SP

91-03 Dyna

Comes complete with mounting kit

With mechanical advanced ignition

HASTING PISTON RINGS MOLY EV80cui +.010 Tändspole Fits: > Customs with internalStd cyl. bore: 3. 4980" (88. 85 mm). 1st. ring: 1. 6mm. 2nd ring: 1. 6mm. oil ring: 4. 0mm. 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