Introduction: The ceramic fuel pump plunger tappet (element 4088593) boosts diesel motor dependability and gas delivery performance, guaranteeing compatibility with Cummins ISC eight.3 and Paccar PX8 types.
because the https://www.shilindiesel.com/blogs-detail/a-closer-look-at-fuel-injection-pump-plunger-tappet-features-and-benefits