S&S, cylinder head/base & exhaust gasket kit. 3.927" - 99-17 Twin Cam with 3.927" bore cylinders (NU) 598055 This system may not fit

This system may not fit custom frames

Each hidden breather is O-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing

Note: See 972866 (polished) or 972594 (black) for the optional aluminum Sharknose taillight housing

The 100% acrylic knit Biltwell Script beanie is ideal for maintenance

Re-positions the speedometer and indicator light unit from handlebar to the left side of engine

S&S, cylinder head/base & exhaust gasket kit. 3.927" - 99-17 Twin Cam with 3.927" bore cylinders (NU) 598055 This system may not fitKit includes cylinder head gaskets, cylinder base base & exhaust gaskets. Note: Rocker cover gaskets are not included.