These high-quality replacement primary chains from Twin Power™ are superior to the O.E.M. parts. Our premium quality endless chains offer you precision-ground side plates for smoother operation...

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. Direct fit replacements for OEM...

Twin Power's Oil Pump Check Ball for 1937-1999 Big Twin models (excluding 1999 Twin Cam) is a precision steel component that works with the pump check system to help maintain proper oil pressure,...

Twin Power™ 3-stud clutch hub assembly restores smooth clutch engagement and power transfer for 41-E84 Big Twin models, replacing H-D 37550-41B with precision engineering for reliable performance and...

Polished cast aluminum releasing disc fits all stud-type Big Twin clutches. These premium Releasing Discs are made from precision-machined and polished die-cast aluminum. Threaded-steel insert for...

Control clutch jerking and get a smooth release on stud type clutches with this kit. This kit holds the clutch basket in proper position to eliminate clutch jerking or walking. It may be used on rear...