Pertronix D231800 Flame-Thrower Plug and Play Black Cap Marine Billet Electronic Distributor with Ignitor II Technology with Black Cap for Ford 351W Integrated patented Ignitor II technology with adaptive dwell control Non-vented distributor cap with stainless steel fasteners keeps the distributor cap firmly inplace Triple screen spark arrestor offers added protection Warranty: 30 months electronics / limited 1 year mechanical