Stage 3: Dual cam engine. Good top-end increase and great over-rev. Cam uses stock auto-decompression mechanism.The item "Hot Cams Stage 3 Exhaust Camshaft for Yamaha YFZ450 2004-2009" is in sale since Monday, July 31, 2017. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components". The seller is "jawzys" and is located in Hinckley, Ohio. This item can be shipped worldwide.