Premium Replacement Distributor Cap for Mercruiser Inboard Engines with Thunderbolt IV & V HEIThis distributor cap fits GM V-8 Motors with Thunderbolt IV and V HEI Ignitions.Replaces: MERCRUISER Distributor Cap 16457A4 MERCRUISER Distributor Cap 43557 MERCRUISER Distributor Cap 43557A1 MERCRUISER Distributor Cap 805759A2 MERCRUISER Distributor Cap 80579A5 MERCRUISER Distributor Cap 805759T1 MERCRUISER Distributor Cap 805759T2 MERCRUISER Distributor Cap 90746A1 PLEASURECRAFT Distributor Cap RA108009 VOLVO PENTA Distributor Cap 3858975 INDMAR Distributor Cap 556345 SIERRA Distributor Cap 18-5395 CDI ELECTRONICS Distributor Cap E64-0010 *ARCO Assurance 12-month part and labor warranty protection This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }