Quicksilver 393-9459Q1 Distributor CapThe Quicksilver 9459Q1 Distributor Cap fits GM 4-cylinder MerCruiser engines with conventional ignition systems. Made from durable PBT and PET plastics with solid brass inserts, it resists corrosion, electrical pitting, and thermal cracking. Designed to reduce RFI interference, it meets Mercury Marine OEM specifications for reliable engine performance.Features: Durable PBT and PET plastic construction; Solid brass inserts resist corrosion and pitting; Minimizes RFI interference with onboard electronics; High strength-to-weight ratio for durability; Meets Mercury Marine OEM specifications;