{"product_id":"cmi-billet-crank-pulley-kit-5-25","title":"CMI Billet Crank Power Pulley Kit 5.25\" | Air-Cooled VW Type 1 | 6 or 12 Spoke, Stock or Sand Seal Hub | Black, Red or Blue | Made in USA","description":"\u003cp\u003e\u003cstrong\u003eCMI's reduced-diameter power pulley, in the same billet quality as its stock-size crank pulley.\u003c\/strong\u003e The CMI Precision Machining 5.25\" Billet Crank Pulley Kit is the \"power pulley\" in CMI's lineup, CNC machined in the USA from premium 6061-T651 billet aluminum with the CMI logo and timing marks engraved directly into the face. It is built on a heat-treated 4140 steel hub with a black zinc finish, fastened with six stainless steel flat-head cap screws, and the back is pre-drilled and tapped for CMI's optional 5.25\" Hall-sensor crank trigger wheel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWashburn's Metal is an authorized CMI Precision Machining dealer\u003c\/strong\u003e — genuine CMI parts, made in the USA, with full factory support.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e CMI states that its 3.25\" alt\/gen power pulley is intended to be used with the 5.25\" crank power pulley to maintain adequate cooling fan speed. Plan to run the pair together (see the sizing guide below).\u003c\/p\u003e\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAir-cooled VW \u003cstrong\u003eType 1 engines\u003c\/strong\u003e in Beetle, Karmann Ghia, Type 1-powered Bus, Thing, Baja Bug, dune buggies and sand rails.\u003c\/li\u003e\n\u003cli\u003eNot for Type 3 or Type 4 engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSand Seal hub\u003c\/strong\u003e versions are only for cases machined for a sand seal; choose \u003cstrong\u003eStock hub\u003c\/strong\u003e for a standard case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCNC machined in the USA from 6061-T651 billet aluminum\u003c\/li\u003e\n\u003cli\u003eAnodized: hard black anodized, or red or blue anodized (stock-hub versions)\u003c\/li\u003e\n\u003cli\u003eHeat-treated 4140 steel hub, black zinc plated, six stainless flat-head cap screws\u003c\/li\u003e\n\u003cli\u003eCMI logo and timing marks engraved into the pulley\u003c\/li\u003e\n\u003cli\u003ePre-drilled and tapped for the CMI 5.25\" Crank Trigger Wheel Kit (Hall sensor, 36-1), sold separately\u003c\/li\u003e\n\u003cli\u003e6-spoke or 12-spoke design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eCMI Precision Machining (Corona, CA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003ctd\u003e5.25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePulley material\u003c\/th\u003e\n\u003ctd\u003e6061-T651 billet aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub\u003c\/th\u003e\n\u003ctd\u003eHeat-treated 4140 steel, black zinc plated (listed by the dealer as 50mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFasteners\u003c\/th\u003e\n\u003ctd\u003eSix stainless steel flat-head cap screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eAnodized: Black, Red or Blue (Sand Seal hub: Black only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTrigger wheel provision\u003c\/th\u003e\n\u003ctd\u003ePre-drilled and tapped for CMI crank trigger kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003ePart Numbers\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpokes\u003c\/th\u003e\n\u003cth\u003eHub\u003c\/th\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003e2116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003e2521\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003ctd\u003e2522\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eSand Seal\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003e2116-SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003e2118\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003e2525\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003ctd\u003e2526\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eSand Seal\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003e2118-SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhich Pulley Do I Need?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.25\" power pulley vs 6.75\":\u003c\/strong\u003e the 5.25\" crank turns the fan and alternator\/generator more slowly for a given alternator\/generator pulley size. CMI's guidance is to pair it with the CMI 3.25\" Dimpled Billet Alt\/Gen Power Pulley to maintain adequate cooling fan speed. If you want to keep a standard-size alternator\/generator pulley, choose the CMI 6.75\" crank pulley instead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley ratios (calculated from diameters):\u003c\/strong\u003e 5.25\" crank with 3.25\" alt\/gen = about 1.62:1; 6.75\" crank with 4.3\" alt\/gen = about 1.57:1; 5.25\" crank with 4.3\" alt\/gen = about 1.22:1, which slows the cooling fan noticeably. Ask us before mixing sizes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6 vs 12 spokes:\u003c\/strong\u003e styling only; same materials, hub and price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock vs Sand Seal hub:\u003c\/strong\u003e Sand Seal only for a case machined for a sand seal (black only).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEFI or crank-fire:\u003c\/strong\u003e add the CMI 5.25\" Crank Trigger Wheel Kit (Hall sensor).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplaces the factory crank pulley on the crankshaft snout using your crank pulley bolt and washer (CMI stainless bolt and washer kit A07 available separately).\u003c\/li\u003e\n\u003cli\u003eA smaller crank pulley changes belt geometry; confirm belt fit and tension, and shim the alt\/gen pulley to set tension and alignment.\u003c\/li\u003e\n\u003cli\u003eVerify ignition timing against the engraved marks with a timing light after installation.\u003c\/li\u003e\n\u003cli\u003eUse the torque specification from your engine builder or factory manual for the crank pulley bolt.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a smaller alternator\/generator pulley with this?\u003c\/strong\u003e\u003cbr\u003eCMI states the 3.25\" alt\/gen power pulley is intended to be used with the 5.25\" crank power pulley to maintain adequate cooling fan speed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich hub should I choose?\u003c\/strong\u003e\u003cbr\u003eStock hub for a standard case; Sand Seal only if your case is machined for a sand seal (black only).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the crank trigger wheel included?\u003c\/strong\u003e\u003cbr\u003eNo. The pulley is pre-drilled and tapped for the CMI 5.25\" Crank Trigger Wheel Kit, sold separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit a Type 3 or Type 4?\u003c\/strong\u003e\u003cbr\u003eNo, it is made for the Type 1 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre all colors the same price?\u003c\/strong\u003e\u003cbr\u003eYes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is it made?\u003c\/strong\u003e\u003cbr\u003eCNC machined in the USA by CMI Precision Machining.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre you an authorized CMI dealer?\u003c\/strong\u003e\u003cbr\u003eYes. Washburn's Metal is an authorized dealer for CMI Precision Machining, so you get genuine CMI parts and factory support.\u003c\/p\u003e","brand":"CMI","offers":[{"title":"12-Spoke \/ Stock Hub \/ Black","offer_id":48380233416819,"sku":"2116","price":145.95,"currency_code":"USD","in_stock":true},{"title":"12-Spoke \/ Stock Hub \/ Red","offer_id":48380233449587,"sku":"2521","price":145.95,"currency_code":"USD","in_stock":true},{"title":"12-Spoke \/ Stock Hub \/ Blue","offer_id":48380233482355,"sku":"2522","price":145.95,"currency_code":"USD","in_stock":true},{"title":"12-Spoke \/ Sand Seal Hub \/ Black","offer_id":48380233515123,"sku":"2116-SS","price":145.95,"currency_code":"USD","in_stock":true},{"title":"6-Spoke \/ Stock Hub \/ Black","offer_id":48380233547891,"sku":"2118","price":145.95,"currency_code":"USD","in_stock":true},{"title":"6-Spoke \/ Stock Hub \/ Red","offer_id":48380233580659,"sku":"2525","price":145.95,"currency_code":"USD","in_stock":true},{"title":"6-Spoke \/ Stock Hub \/ Blue","offer_id":48380233613427,"sku":"2526","price":145.95,"currency_code":"USD","in_stock":true},{"title":"6-Spoke \/ Sand Seal Hub \/ Black","offer_id":48380233646195,"sku":"2118-SS","price":145.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/CMI-12SP-52-2.jpg?v=1789881181","url":"https:\/\/www.washburnsmetal.com\/products\/cmi-billet-crank-pulley-kit-5-25","provider":"Washburn's Metal","version":"1.0","type":"link"}