Introduction: The ceramic gasoline pump plunger tappet (component 4088593) improves diesel motor reliability and fuel shipping performance, guaranteeing compatibility with Cummins ISC 8.3 and Paccar PX8 models. given https://www.shilindiesel.com/blogs-detail/a-closer-look-at-fuel-injection-pump-plunger-tappet-features-and-benefits