S&S HP103 Cam Kit For Harley Twin Cam

Features

• Comes with camshafts and inner and outer gears, this is a complete kit
• Fuel injection tuning required.
• Pinion shaft run-out must be checked before installing S&S Cycle gear drive cams.
• A hydraulic press and other professional tools are required to installS&S Cycle gear drive cams. Additionally, material must be removed from the inner surface of the stock gearcover. The stock crankcase may require clearancing for S&S Cycle .625", .640", and .675" lift cams.
• S&S Cycle recommends that gear drive cams be installed by a professional mechanic.
• Due to the inheraent characteristics of gear drives, you may experience more valve train noise with gear driven cams.
• Oversized and undersized gears are available to help achieve correct gear lash.
• S&S Cycle have found that with 160 lb. of valve seat force, the S&S Cycle gear drive cams will perform well up to 6200 rpm. If higher rpm is anticipated, valve springs that provide higher seat force should be used.
• Camshafts that exceed the limits of the stock valve springs require the use of special high lift springs. Most S&S cams have higher lift than stock and are designed to take advantage of the extra flow of ported stock heads or S&S Cycle Super Stock heads.
• Due to the high lift of these cams,S&S Cycle adjustable pushrods are recommended.
• To get the best performance from a performance cam installation, a high flow intake and exhaust system is also recommended.
• Quick installation and Easy Start Cams allow stock starter to start any engine.
• Kit contains cams, gearcover gasket, cam bearings, and instructions.
• 1999-2004 stock springs will handle camshafts with lift up to 0.510". If a camshaft with higher lift is installed, high performance valve springs capable of handling a greater lift must be used.
• 2005-up stock valve springs will handle camshafts with lift up to 0.585". If a camshaft with higher lift is installed, high performance valve springs capable of handling a greater lift must be used. Cams with over 0.585" of lift will cause interference between the valve spring top collar and the valve seal with stock cylinder heads.
• Installation of S&S chain drive cams requires special tools. Attempting the cam change operation without these tools will be difficult. Damage can result which will not be covered under warranty
• HP103 Camshafts are designed as bolt in cams for engines with 103 and stock 9.7:1 compression up to 10.5:1. Works well with stock, un-ported heads, but is great for S&S CNC ported heads. Best power in the higher rpm range, 3000-6000 rpm. Bolt-in.