Engine Components

Twin Power 80-99 Big Twin 5 Speed Transmission Main and Countershaft Bearing Replaces H-D 8998This Part Fits:YearMakeModelSubmodel1980Harley-DavidsonFLH Electra GlideBase

Twin Power™ transmission side cover gaskets seal the side cover to the transmission case on various Big Twin models, helping prevent gear lube leaks during service.This Part...

Pushrod O-ring Kit or 1984-'99 big twin and 1986-2003 xl models. Includes top, middle, & bottom o-rings for 4 pushrods

Made from ABS plastic, the Twin Power™ Cam Chain Guide is perfect for TC 88 models.This Part Fits:YearMakeModelSubmodel1999-2006Harley-DavidsonFLHR Road KingBase1999-2006

These Twin Power™ tappet guide gaskets seal the tappet blocks to the crankcase on 1999-2017 Twin Cam engines, helping control oil leaks during valvetrain or cam service.

S&S premium quality tappet block gaskets for 1948-1999 Big Twin enginesThis Part Fits:YearMakeModelSubmodel1997-1999Harley-DavidsonFLHR Road KingBase1998-1999Har

Twin Power™ fuel pump plate seals help keep the fuel pump mounting area leak-free on various XL, Dyna, Softail, and FLH/FLT models, supporting reliable fuel delivery and safe operation.This Part...

Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures. Our commitment is to provide innovative, quality gaskets while maximizing...

This Twin Power™ oil pump seal for 2017-up Milwaukee-Eight models helps ensure proper sealing at the oil pump, supporting consistent oil pressure and cleaner operation

Twin Power™ main drive gear seal fits 1994-2006 5-speed Big Twin models except 2006 Dyna, sealing the transmission output gear to help prevent oil leaks.

This Twin Power™ carburetor to manifold seal is designed to maintain a tight, leak-free connection between the carburetor and intake manifold on many Evolution Big Twin and Sportster models.

All of Cometic's gaskets and seals have been tested on both the street and the track as well as vigorous Dyno shakedownsThis Part Fits:YearMakeModelSubmodel2018-2020Harley-DavidsonFLDE Deluxe 107