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The Camshaft Exhaust Stage 1 System is part of the latest collection from Hot Cams.. Features: Stage 2 is designed for mid to top end gains. Adds a 5%-10% power gain. Designed and dyno proven in the USA. Manufactured by utilizing state of the art valvetrain software. CNC machined from 8620 billet, case-hardened steel for an exact fit and lobe profile. Engineered to be drop-in cams, that use stock valve springs (unless otherwise noted).. Select cams feature Hot Cams Improved Throttle Design (ITR) technology; these cams improve throttle response throughout the entire rpm range while providing excellent power gains through the mid-range and top-end.. For dual cam engine.. When used with 0925-0555 provides increased mid range and top end power with no loss on low end. Produces more power than OEM cams from 5000 rpm and up with no loss at lower rpm. There is more power than the stage 1 set from 7000 rpm and up. Uses stock auto-decompression mechansim. Exhaust Valve Lash: 0.150 mm.. Specifications: Application: Exhaust. Exhaust Duration: 259�. Exhaust Lift: 10.160 mm. Exhaust Lobe Centerline: 103.500�. Product Name: Camshaft. Type: Stage 2. Units: Each. To fit: KAWASAKI KX 450 F 2006 All Models. KAWASAKI KX 450 F 2007 All Models. KAWASAKI KX 450 F 2008 All Models. KAWASAKI KX 450 F 2009 All Models. KAWASAKI KX 450 F 2010 All Models. KAWASAKI KX 450 F 2011 All Models. KAWASAKI KX 450 F 2012 All Models. KAWASAKI KX 450 F 2013 All Models. KAWASAKI KX 450 F 2014 All Models. KAWASAKI KX 450 F 2015 All Models. Manufacturer part number: 2188-2E. View all Hot Cams. View all Parts and spares..