BarracudaCast BR32126

from the manufacturer:

This set consists of a pair of detailed early style distributors and duplex-style ignition harness ring for F4U-1, and early F4U-1A Corsairs. This high pressure ignition system was prone to failure in flight and was replaced on later models by the style found in the kit. Stubs have pilot holes for drilling out and fitting plug wires.Designed to fit Tamiya’s kit, but can be adapted to other Corsairs.