{"product_id":"hot-cams-stage-2-racing-camshaft-4166-2ex-for-2010-2013-yamaha-yz450f","title":"Hot Cams Stage 2 Racing Camshaft 4166-2EX for 2010-2013 Yamaha YZ450F","description":"WE RACE ON THE TRACK, NOT THE DYNO! Most camshaft designs are developed only on a dyno. Good camshaft designs not only increase power, they also improve throttle response. However, more power and better throttle response is a difficult design problem. Hotcams’ ITR technology solved this dilemma through highly engineered opening ramps not found on other cams. Using ITR technology, the critical ramp area is designed to give your engine a cleaner intake charge and a more efficient combustion cycle, making your engine more responsive at all throttle openings and giving the rider better feel and control of the engine! You will notice the difference!\n\u003cp\u003eThe Hot Cams Stage 2 Racing Camshaft is engineered for riders who demand stronger engine response and race-focused performance from their Yamaha YZ450F. Manufacturer part number 4166-2EX, also identified by vendor part number 4166-2EX, this high-performance camshaft uses Hot Cams Improved Throttle Response (ITR) technology to optimize the critical opening-ramp area. The result is a cleaner intake charge, a more efficient combustion cycle, and sharper response across the throttle range.\u003c\/p\u003e\u003cp\u003eUnlike camshaft designs developed solely for dyno power, the Hot Cams Stage 2 profile is designed to improve both power delivery and rider control on the track. Its racing-oriented design helps the engine respond more quickly to throttle inputs, giving the rider improved feel during acceleration and transitions. The camshaft is intended for use with stock valve springs and rockers in most applications, helping simplify installation while maintaining compatibility with the factory valvetrain components.\u003c\/p\u003e\u003cp\u003eFitment includes the 2010, 2011, 2012, and 2013 Yamaha YZ450F. No core is required. This camshaft is designed for racing applications and is not legal for use in California on pollution-controlled vehicles; California use is limited to racing applications, with a waiver available where applicable. Verify engine configuration and installation requirements before fitting.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStage 2 high-performance racing camshaft for Yamaha YZ450F applications\u003c\/li\u003e\n\u003cli\u003eHot Cams Improved Throttle Response (ITR) technology\u003c\/li\u003e\n\u003cli\u003eDesigned to improve throttle response, engine feel, and track performance\u003c\/li\u003e\n\u003cli\u003eEngineered opening ramps promote a cleaner intake charge and efficient combustion cycle\u003c\/li\u003e\n\u003cli\u003eDesigned to use stock valve springs and rockers in most applications\u003c\/li\u003e\n\u003cli\u003eNo core required\u003c\/li\u003e\n\u003cli\u003eAdjustable cam sprockets supplied with some models\u003c\/li\u003e\n\u003cli\u003eFits 2010-2013 Yamaha YZ450F\u003c\/li\u003e\n\u003cli\u003eManufacturer and vendor part number: 4166-2EX\u003c\/li\u003e\n\u003cli\u003eRace use only in California on pollution-controlled vehicles; waiver available\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2010 Yamaha YZ450F\u003cbr\u003e\n2011 Yamaha YZ450F\u003cbr\u003e\n2012 Yamaha YZ450F\u003cbr\u003e\n2013 Yamaha YZ450F","brand":"HOT CAMS","offers":[{"title":"Default Title","offer_id":67552820691179,"sku":"68-2563","price":320.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/e93d-5a5e7324dbad4.jpg?v=1790741520","url":"https:\/\/ctracingservices.com\/products\/hot-cams-stage-2-racing-camshaft-4166-2ex-for-2010-2013-yamaha-yz450f","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}