HEI Ignition Coil MerCruiser Thunderbolt IV & V6 4.3L, and V8, 5.0L and 5.7
A-Team Performance EST Marine Electronic Ignition Distributor and Coil Upgrade Kit V8 5.0 5.7 7.4 18-5514 3857449 Compatible with Mercruiser EFI Chevy Chevrolet Volvo Penta OMC Red Cap — Southwest Performance Parts