{"product_id":"cmi-dimpled-billet-alt-gen-power-pulley-kit-3-25","title":"CMI Dimpled Billet Alt\/Gen Power Pulley Kit 3.25\" | Air-Cooled VW Type 1 | Black, Red or Blue | Made in USA","description":"\u003cp\u003e\u003cstrong\u003eThe top half of CMI's power-pulley system.\u003c\/strong\u003e The CMI Precision Machining 3.25\" Dimpled Billet Alt\/Gen Power Pulley Kit is CNC machined in the USA from premium 6061-T651 billet aluminum, with a 7075-T651 aluminum pulley nut and a distinctive dimpled face. CMI machines it with the correct backspacing so it will not rub the alternator, and uses its unique, worry-free \u003cstrong\u003ePosi-Lock\u003c\/strong\u003e machined pulley-half design. The kit includes the pulley nut and spacer plus four 0.015\" steel shims.\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\u003eCooling caution (from CMI):\u003c\/strong\u003e 3.25\" alt\/gen power pulleys are intended to be used with 5.25\" crank power pulleys to maintain adequate cooling fan speed. Do not install this pulley without also running a 5.25\" crank power pulley.\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 with alternator or generator: Beetle, Karmann Ghia, Type 1-powered Bus, Thing, Baja Bug, dune buggies and sand rails.\u003c\/li\u003e\n\u003cli\u003eMust be paired with a 5.25\" crank power pulley, such as the CMI 5.25\" Billet Crank Power Pulley Kit.\u003c\/li\u003e\n\u003cli\u003eNot for Type 3 or Type 4 engines.\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 (pulley halves \/ clamp)\u003c\/li\u003e\n\u003cli\u003e7075-T651 aluminum pulley nut\u003c\/li\u003e\n\u003cli\u003eDimpled billet face styling\u003c\/li\u003e\n\u003cli\u003eCorrect backspacing so it will not rub the alternator\u003c\/li\u003e\n\u003cli\u003eUnique worry-free Posi-Lock machined pulley-half design\u003c\/li\u003e\n\u003cli\u003eAnodized in black, red or blue\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBillet power pulley (two halves)\u003c\/li\u003e\n\u003cli\u003ePulley nut and spacer\u003c\/li\u003e\n\u003cli\u003e4 steel shims, 0.015\"\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\u003e3.25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePulley \/ clamp material\u003c\/th\u003e\n\u003ctd\u003e6061-T651 billet aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNut material\u003c\/th\u003e\n\u003ctd\u003e7075-T651 aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eAnodized: Black, Red or Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePairs with\u003c\/th\u003e\n\u003ctd\u003e5.25\" crank power pulley (required for adequate fan speed)\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\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\u003eBlack\u003c\/td\u003e\n\u003ctd\u003e2115\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003e2519\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003ctd\u003e2520\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\u003eRunning a 5.25\" crank power pulley?\u003c\/strong\u003e This 3.25\" is the matching alt\/gen pulley. Pulley ratio (calculated from diameters): about 1.62:1, versus about 1.57:1 for a 6.75\" crank with a 4.3\" alt\/gen pulley.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRunning a full-diameter crank pulley such as CMI's 6.75\"?\u003c\/strong\u003e Choose the CMI 4.3\" Billet Alt\/Gen Pulley Kit instead. A 3.25\" top pulley with a 6.75\" crank would spin the fan and alternator considerably faster (about 2.08:1).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e black, red or blue anodized, all the same price.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSet belt tension with the supplied shims between the pulley halves; fewer shims between the halves tightens the belt. Store spare shims under the nut.\u003c\/li\u003e\n\u003cli\u003eA smaller pulley pair changes belt length requirements; confirm belt fit before final assembly.\u003c\/li\u003e\n\u003cli\u003eFollow the factory manual for pulley nut procedure and belt deflection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this with a full-diameter crank pulley?\u003c\/strong\u003e\u003cbr\u003eCMI states 3.25\" alt\/gen power pulleys are intended to be used with 5.25\" crank power pulleys to maintain adequate cooling fan speed. With a full-diameter crank pulley such as CMI's 6.75\", choose the 4.3\" pulley.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit both alternator and generator?\u003c\/strong\u003e\u003cbr\u003eYes, it is sold as an alt\/gen pulley kit for the Type 1 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's included?\u003c\/strong\u003e\u003cbr\u003eThe pulley, nut and spacer, and four 0.015\" steel shims.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it rub my alternator?\u003c\/strong\u003e\u003cbr\u003eCMI machines it with the correct backspacing so it will not rub the alternator.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there a price difference between colors?\u003c\/strong\u003e\u003cbr\u003eNo.\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":"Black","offer_id":48380236562547,"sku":"2115","price":100.95,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":48380236595315,"sku":"2519","price":100.95,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":48380236628083,"sku":"2520","price":100.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/CMI-DIMP-32-2.jpg?v=1789881262","url":"https:\/\/www.washburnsmetal.com\/products\/cmi-dimpled-billet-alt-gen-power-pulley-kit-3-25","provider":"Washburn's Metal","version":"1.0","type":"link"}