Holley 554-112 Four Channel Ignition Coil Driver Module NEW
Fitment and Product Information. Holley 554-112 Four Channel Ignition Coil Driver Module NEW. The four channel coil driver module is used to drive a two wire dumb ignition coil. Such coils are typically used on Ford Modular and late model Chrysler HEMI engines. Holley ECUs require this coil driver module when running two wire dumb […]