{"product_id":"marine-distributor-cap-for-volvo-penta-v-8-gm-module-in-cap-ignition-replaces-3862014-243658-sierra-18-5394","title":"Sierra Distributor Cap 18-5394, Replaces 243658, for GM V-8 New Style Ignition","description":"\u003cp\u003eThe Sierra 18-5394 is a marine distributor cap engineered for GM V-8 engines of the new style design, where the ignition module is integrated directly into the cap itself rather than mounted as a separate external component. This module-in-cap construction simplifies the ignition system layout and is specific to the newer GM V-8 configuration it is built for.\u003c\/p\u003e\u003cp\u003eThe cap uses a twist-on closure for a secure, positive connection to the distributor body, helping keep moisture and contaminants out of the ignition circuit in a marine environment. It measures 4.9 x 5.5 x 3.6 inches and weighs 0.25 pounds. This distributor cap directly replaces OEM part number 243658, making it a straightforward swap for boats and stern drives originally equipped with that component.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5394\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Distributor Cap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 243658\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e GM V-8, new style\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Module:\u003c\/strong\u003e Integrated (Module in Cap)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosure Type:\u003c\/strong\u003e Twist-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 4.9 x 5.5 x 3.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999319128\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM V-8 engines, new style (module-in-cap design)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e243658\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-5394 distributor cap fit?\u003c\/strong\u003e The 18-5394 is built for GM V-8 engines of the new style, where the ignition module is integrated into the cap rather than mounted separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does this distributor cap replace?\u003c\/strong\u003e Sierra 18-5394 replaces OEM part number 243658.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is meant by 'module in cap' for this distributor cap?\u003c\/strong\u003e It means the ignition module is built directly into the distributor cap assembly of the 18-5394, rather than being a separate external module bolted to the distributor housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5394 distributor cap weigh?\u003c\/strong\u003e The Sierra 18-5394 weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this distributor cap?\u003c\/strong\u003e The 18-5394 measures 4.9 x 5.5 x 3.6 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the cap attach to the distributor?\u003c\/strong\u003e It uses a twist-on closure, which secures the 18-5394 cap onto the distributor body.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-5394 is a Sierra-branded distributor cap sold under Sierra's own part number as a direct replacement for OEM 243658.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering Sierra 18-5394 includes one distributor cap.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this cap work with older GM distributor styles?\u003c\/strong\u003e The 18-5394 is designed for the new style GM V-8 distributor with an integrated module, not the older design that uses a separate external module.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this distributor cap fit V-6 or only V-8 GM engines?\u003c\/strong\u003e The Sierra 18-5394 is designated for GM V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-5394 distributor cap?\u003c\/strong\u003e The UPC for the Sierra 18-5394 distributor cap is 030999319128.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988212855003,"sku":"SIE-18-5394","price":7.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5394_lg__55927.1558127686.500.750.jpg?v=1785188158","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-distributor-cap-for-volvo-penta-v-8-gm-module-in-cap-ignition-replaces-3862014-243658-sierra-18-5394","provider":"Good Vibes Marina","version":"1.0","type":"link"}