106-1818 36-47 solid lifter tappet, exhaust. +.005"

Maintaining the valvetrain on a vintage Big Twin requires high-quality components that can handle the heat and mechanical stress of the exhaust cycle. This S&S solid lifter exhaust tappet is engineered to fit 1936 to 1947 Knucklehead models and is also the standard replacement for S&S KN-series engines. It features a +.005" oversize outside diameter, providing a perfect solution for engine builders working with slightly worn or oversized tappet bores in original crankcases. By using an oversize tappet, you can restore the tight tolerances necessary for smooth operation and longevity. This exhaust-specific tappet is sold individually and is a critical component for any serious Knucklehead restoration or maintenance project where precision fitment is the priority.