Sierra 18-5274 MerCruiser V6 HEI Thunderbolt Tune Up Kit

Sierra 18-5438 Ignition Coil for Thunderbolt MerCruiser & Crusader Ignitions Sierra replacement ignition coil. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements...

Sierra 18-5273 MerCruiser Tune Up Kit for V8 Thunderbolt HEI Ignitions  Sierra high-quality engine parts are designed to meet OEM specifications. Fits GM V-8 engines with Thunderbolt IV & V...

Sierra 18-5396 Mercruiser Distributor Cap V6 Thunderbolt Ignition Sierra high-quality engine parts are designed to meet OEM specifications. Includes gasket Fits GM V-6 engines with Thunderbolt...

Sierra 18-5432 Mercruiser V-6 Rotor Assembly Sierra high-quality engine parts are designed to meet OEM speficiations. Fits GM V-6 engines with Thunderbolt IV & V HEI Ignition. Interchangeable...