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