{"title":"Marine Pulleys","description":null,"products":[{"product_id":"whipple-12-rib-marine-supercharger-pulley-for-4-5l-w275ax","title":"Whipple 12-Rib Marine Supercharger Pulley for 4.5L \/ W275AX","description":"\u003cp\u003eThis Whipple 12-rib marine supercharger pulley is designed for compatible 4.5L \/ W275AX Whipple marine supercharger applications. Each pulley is machined from 6061-T6 billet aluminum and anodized for wear resistance and environmental protection in demanding performance and marine-use conditions.\u003c\/p\u003e\n\u003cp\u003eThe pulley design includes lightweight pocketing to help reduce rotating mass, a guarded outer profile to help reduce unwanted belt wandering during hard running, and engraved running diameter identification for easier service and setup verification. Pulley dimensions are based on the running diameter.\u003c\/p\u003e\n\u003cp\u003eThis product is available with finish and diameter options. Finish options include black, blue, and clear anodized. Available running diameters include 3.25\", 3.50\", 3.75\", 4.00\", 4.25\", 4.50\", 4.75\", and 5.00\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral pulley sizing note:\u003c\/strong\u003e As a general rule of thumb, every 0.125\" pulley change is approximately 0.75 PSI of boost change, increasing or decreasing depending on pulley direction and the full drive combination. Actual boost change can vary based on engine setup, supercharger configuration, belt system, operating conditions, calibration, and supporting hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication note:\u003c\/strong\u003e Whipple supercharger pulleys are application-specific. Verify pulley diameter, rib count, belt system, supercharger model, and application before ordering. Do not order this pulley for a different application unless compatibility has been confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns note:\u003c\/strong\u003e There are no returns or exchanges for used pulleys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Features\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e12-rib marine supercharger pulley\u003c\/li\u003e\n  \u003cli\u003eDesigned for compatible 4.5L \/ W275AX Whipple supercharger applications\u003c\/li\u003e\n  \u003cli\u003eBillet 6061-T6 aluminum construction\u003c\/li\u003e\n  \u003cli\u003eBlack, blue, and clear anodized finish options\u003c\/li\u003e\n  \u003cli\u003eAvailable in 3.25\", 3.50\", 3.75\", 4.00\", 4.25\", 4.50\", 4.75\", and 5.00\" running diameters\u003c\/li\u003e\n  \u003cli\u003eEngraved running diameter identification\u003c\/li\u003e\n  \u003cli\u003eLightweight pocketed design helps reduce rotating mass\u003c\/li\u003e\n  \u003cli\u003eGuarded profile helps reduce belt wandering during hard running\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whipple Superchargers","offers":[{"title":"Default Title","offer_id":56180570980674,"sku":"SCP-RG12-275AX","price":225.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6002\/9506\/files\/F198648139.jpg?v=1789511628"},{"product_id":"whipple-12-rib-6-bolt-crank-pulleys","title":"Whipple 12-Rib 6-Bolt Crank Pulleys","description":"\u003cp\u003eWhipple 12-rib 6-bolt crank pulleys are built for Whipple supercharger applications that require a durable, high-quality crank pulley solution. Machined from billet 6061-T6 aluminum, these pulleys are designed to deliver strength, reduced mass, and the clean fit expected from a Whipple component.\u003c\/p\u003e\n\u003cp\u003eThe universal 6-bolt pattern fits most 3V and serpentine base crank pulleys, making these a versatile option for compatible Whipple applications. Each pulley features an anodized finish and lightweight pocketing to help reduce rotating mass while maintaining the durability needed for demanding supercharged use.\u003c\/p\u003e\n\u003cp\u003eAvailable in multiple sizes, these crank pulleys are commonly associated with Whipple marine and performance applications, including Chevrolet Big Block, Mercury Marine 454\/502 Magnum MPI, Mercury Racing 500 HP Carbureted, Mercury Racing 500 HP EFI, Mercury Racing 525 HP EFI, and Mercury Racing 575SCI categories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Features\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBillet 6061-T6 aluminum construction\u003c\/li\u003e\n  \u003cli\u003e12-rib design for Whipple supercharger applications\u003c\/li\u003e\n  \u003cli\u003eUniversal 6-bolt pattern fits most 3V and serpentine base crank pulleys\u003c\/li\u003e\n  \u003cli\u003eAnodized finish\u003c\/li\u003e\n  \u003cli\u003eLightweight pocketing to help reduce mass\u003c\/li\u003e\n  \u003cli\u003eAvailable in multiple sizes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whipple Superchargers","offers":[{"title":"Default Title","offer_id":56180571406658,"sku":"WCP-12B6B-CP","price":240.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6002\/9506\/files\/F198646906.jpg?v=1789511632"},{"product_id":"whipple-12-rib-supercharger-pulleys-for-mercury-racing-850-1025-1075-1200-sci","title":"Whipple 12-Rib Supercharger Pulleys for Mercury Racing 850\/1025\/1075\/1200 SCI","description":"\u003cp\u003eThese Whipple 12-rib supercharger pulleys are designed for compatible Mercury Racing 850\/1025\/1075\/1200 SCI applications and related Whipple marine supercharger belt-drive setups. Each pulley is machined from 6061-T6 billet aluminum and anodized for wear resistance and environmental protection in demanding marine-use conditions.\u003c\/p\u003e\n\u003cp\u003eThe pulley design includes lightweight pocketing to help reduce rotating mass, a guarded outer profile to help reduce unwanted belt wandering during hard running, and engraved running diameter identification for easier service and setup verification. Pulley dimensions are based on the running diameter.\u003c\/p\u003e\n\u003cp\u003eThis product is available in multiple running diameters: 4.05\", 4.45\", 4.65\", and 4.85\". Standard finish is hard coat clear anodized.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStock pulley reference:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMercury Racing 1025\/1075\/1200 SCI: 4.05\" stock diameter\u003c\/li\u003e\n  \u003cli\u003eMercury Racing 850 SCI: 4.73\" stock diameter; use 4.65\" for replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral pulley sizing note:\u003c\/strong\u003e As a general rule of thumb, every 0.125\" pulley change is approximately 0.75 PSI of boost change, increasing or decreasing depending on pulley direction and the full drive combination. Actual boost change can vary based on engine setup, supercharger configuration, belt system, operating conditions, PCM control strategy, calibration, and supporting hardware. On stock PCM-controlled applications, pulley changes may not change boost levels without the proper supporting calibration and setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication note:\u003c\/strong\u003e Whipple supercharger pulleys are application-specific. Verify pulley diameter, rib count, belt system, calibration requirements, and application before ordering. Do not order this pulley for a different application unless compatibility has been confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns note:\u003c\/strong\u003e There are no returns or exchanges for used pulleys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Features\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e12-rib supercharger pulley\u003c\/li\u003e\n  \u003cli\u003eDesigned for compatible Mercury Racing 850\/1025\/1075\/1200 SCI applications\u003c\/li\u003e\n  \u003cli\u003eBillet 6061-T6 aluminum construction\u003c\/li\u003e\n  \u003cli\u003eHard coat clear anodized finish\u003c\/li\u003e\n  \u003cli\u003eAvailable in 4.05\", 4.45\", 4.65\", and 4.85\" running diameters\u003c\/li\u003e\n  \u003cli\u003eEngraved running diameter identification\u003c\/li\u003e\n  \u003cli\u003eLightweight pocketed design helps reduce rotating mass\u003c\/li\u003e\n  \u003cli\u003eGuarded profile helps reduce belt wandering during hard running\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whipple Superchargers","offers":[{"title":"Default Title","offer_id":56180571701570,"sku":"SCP-MR-12-4","price":345.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6002\/9506\/files\/F198646507.jpg?v=1789511637"},{"product_id":"whipple-10-rib-4-bolt-marine-supercharger-pulley","title":"Whipple 10-Rib 4-Bolt Marine Supercharger Pulley","description":"\u003cp\u003eThis Whipple 10-rib 4-bolt marine supercharger pulley is designed for compatible Whipple marine supercharger belt-drive applications. Each pulley is machined from 6061-T6 billet aluminum and anodized for wear resistance and environmental protection in demanding performance and marine-use conditions.\u003c\/p\u003e\n\u003cp\u003eThe pulley design includes lightweight pocketing to help reduce rotating mass, a guarded outer profile to help reduce unwanted belt wandering during hard running, and engraved running diameter identification for easier service and setup verification. Pulley dimensions are based on the running diameter.\u003c\/p\u003e\n\u003cp\u003eThis product is available with finish and diameter options. Standard finish is hard coat black anodized, with blue finish available as an option. Available running diameters include 2.50\", 2.625\", 2.75\", 2.875\", 3.00\", 3.125\", 3.25\", 3.375\", 3.50\", 3.625\", 3.75\", 3.875\", 4.00\", 4.125\", 4.25\", 4.375\", 4.50\", 4.625\", 4.75\", and 4.875\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral pulley sizing note:\u003c\/strong\u003e As a general rule of thumb, every 0.125\" pulley change is approximately 0.75 PSI of boost change, increasing or decreasing depending on pulley direction and the full drive combination. Actual boost change can vary based on engine setup, supercharger configuration, belt system, operating conditions, and supporting hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication note:\u003c\/strong\u003e Whipple supercharger pulleys are application-specific. Verify pulley diameter, rib count, bolt pattern, belt system, and application before ordering. Do not order this pulley for a different application unless compatibility has been confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns note:\u003c\/strong\u003e There are no returns or exchanges for used pulleys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Features\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10-rib marine supercharger pulley\u003c\/li\u003e\n  \u003cli\u003e4-bolt pulley design\u003c\/li\u003e\n  \u003cli\u003eBillet 6061-T6 aluminum construction\u003c\/li\u003e\n  \u003cli\u003eHard coat black anodized finish standard\u003c\/li\u003e\n  \u003cli\u003eBlue finish option available\u003c\/li\u003e\n  \u003cli\u003eEngraved running diameter identification\u003c\/li\u003e\n  \u003cli\u003eLightweight pocketed design helps reduce rotating mass\u003c\/li\u003e\n  \u003cli\u003eGuarded profile helps reduce belt wandering during hard running\u003c\/li\u003e\n  \u003cli\u003eAvailable in multiple running diameters from 2.50\" to 4.875\"\u003c\/li\u003e\n  \u003cli\u003eDesigned for compatible Whipple marine supercharger applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whipple Superchargers","offers":[{"title":"Default Title","offer_id":56180576190786,"sku":"SCP-RG10","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6002\/9506\/files\/F198648134.jpg?v=1789511681"},{"product_id":"whipple-12-rib-4-bolt-marine-supercharger-pulley","title":"Whipple 12-Rib 4-Bolt Marine Supercharger Pulley","description":"\u003cp\u003eThis Whipple 12-rib 4-bolt marine supercharger pulley is designed for compatible Whipple marine supercharger belt-drive applications using 2.3L, 2.9L, 3.3L, and 4.0L Whipple superchargers. Each pulley is machined from 6061-T6 billet aluminum and anodized for wear resistance and environmental protection in demanding performance and marine-use conditions.\u003c\/p\u003e\n\u003cp\u003eThe pulley design includes lightweight pocketing to help reduce rotating mass, a guarded outer profile to help reduce unwanted belt wandering during hard running, and engraved running diameter identification for easier service and setup verification. Pulley dimensions are based on the running diameter.\u003c\/p\u003e\n\u003cp\u003eThis product is available with finish and diameter options. Standard finish is hard coat black anodized, with blue finish available as an option. Available running diameters include 2.50\", 2.625\", 2.75\", 2.875\", 3.00\", 3.125\", 3.25\", 3.375\", 3.50\", 3.625\", 3.75\", 3.875\", 4.00\", 4.125\", 4.25\", 4.375\", 4.50\", 4.625\", 4.75\", and 4.875\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral pulley sizing note:\u003c\/strong\u003e As a general rule of thumb, every 0.125\" pulley change is approximately 0.75 PSI of boost change, increasing or decreasing depending on pulley direction and the full drive combination. Actual boost change can vary based on engine setup, supercharger configuration, belt system, operating conditions, and supporting hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication note:\u003c\/strong\u003e Whipple supercharger pulleys are application-specific. Verify pulley diameter, rib count, bolt pattern, belt system, supercharger model, and application before ordering. Do not order this pulley for a different application unless compatibility has been confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e This pulley does not fit 4.5L \/ W275 superchargers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns note:\u003c\/strong\u003e There are no returns or exchanges for used pulleys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Features\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e12-rib marine supercharger pulley\u003c\/li\u003e\n  \u003cli\u003e4-bolt pulley design\u003c\/li\u003e\n  \u003cli\u003eFits compatible 2.3L, 2.9L, 3.3L, and 4.0L Whipple superchargers\u003c\/li\u003e\n  \u003cli\u003eBillet 6061-T6 aluminum construction\u003c\/li\u003e\n  \u003cli\u003eHard coat black anodized finish standard\u003c\/li\u003e\n  \u003cli\u003eBlue finish option available\u003c\/li\u003e\n  \u003cli\u003eEngraved running diameter identification\u003c\/li\u003e\n  \u003cli\u003eLightweight pocketed design helps reduce rotating mass\u003c\/li\u003e\n  \u003cli\u003eGuarded profile helps reduce belt wandering during hard running\u003c\/li\u003e\n  \u003cli\u003eAvailable in multiple running diameters from 2.50\" to 4.875\"\u003c\/li\u003e\n  \u003cli\u003eDoes not fit 4.5L \/ W275 superchargers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whipple Superchargers","offers":[{"title":"Default Title","offer_id":56180576223554,"sku":"SCP-RG12","price":220.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6002\/9506\/files\/F198648136.jpg?v=1789511682"},{"product_id":"whipple-10-rib-supercharger-pulleys-for-mercury-racing-600-662-700-sci","title":"Whipple 10-Rib Supercharger Pulleys for Mercury Racing 600\/662\/700 SCI","description":"\u003cp\u003eThese Whipple 10-rib supercharger pulleys are designed for compatible Mercury Racing 600\/662\/700 SCI applications. Each pulley is machined from 6061-T6 billet aluminum and anodized for wear resistance and environmental protection in demanding marine-use conditions.\u003c\/p\u003e\n\u003cp\u003eThe pulley design includes lightweight pocketing to help reduce rotating mass, a guarded outer profile to help reduce unwanted belt wandering during hard running, and engraved running diameter identification for easier service and setup verification. Pulley dimensions are based on the running diameter.\u003c\/p\u003e\n\u003cp\u003eThis product is available with finish and diameter options. Finish options include clear anodized and blue anodized. Available running diameters include 3.00\", 3.25\", 3.50\", and 3.75\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStock pulley reference:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMercury Racing 600 SCI: 4.00\" stock diameter\u003c\/li\u003e\n  \u003cli\u003eMercury Racing 700 SCI: 3.50\" stock diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral pulley sizing note:\u003c\/strong\u003e As a general rule of thumb, every 0.125\" pulley change is approximately 0.75 PSI of boost change, increasing or decreasing depending on pulley direction and the full drive combination. Actual boost change can vary based on engine setup, supercharger configuration, belt system, operating conditions, PCM control strategy, calibration, and supporting hardware. On stock PCM-controlled applications, pulley changes may not change boost levels without the proper supporting calibration and setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication note:\u003c\/strong\u003e Whipple supercharger pulleys are application-specific. Verify pulley diameter, rib count, belt system, calibration requirements, and application before ordering. Do not order this pulley for a different application unless compatibility has been confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReturns note:\u003c\/strong\u003e There are no returns or exchanges for used pulleys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eKey Features\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10-rib supercharger pulley\u003c\/li\u003e\n  \u003cli\u003eDesigned for compatible Mercury Racing 600\/662\/700 SCI applications\u003c\/li\u003e\n  \u003cli\u003eBillet 6061-T6 aluminum construction\u003c\/li\u003e\n  \u003cli\u003eClear anodized and blue anodized finish options\u003c\/li\u003e\n  \u003cli\u003eAvailable in 3.00\", 3.25\", 3.50\", and 3.75\" running diameters\u003c\/li\u003e\n  \u003cli\u003eEngraved running diameter identification\u003c\/li\u003e\n  \u003cli\u003eLightweight pocketed design helps reduce rotating mass\u003c\/li\u003e\n  \u003cli\u003eGuarded profile helps reduce belt wandering during hard running\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whipple Superchargers","offers":[{"title":"Default Title","offer_id":56180576289090,"sku":"SCP-MR-10-4","price":295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6002\/9506\/files\/F198648188.jpg?v=1789511682"}],"url":"https:\/\/whipplesuperchargers.com\/collections\/marine-pulleys.oembed","provider":"whipplesuperchargers","version":"1.0","type":"link"}