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The S&S CYCLE 570G Gear Drive Camshaft Kit (Part Number 33-5178) is engineered for 88 to 103-inch Twin Cam engines with compression ratios ranging from 9:1 to 10:1. This high-performance kit is designed to enhance engine timing accuracy by eliminating timing chain lash and providing a more precise valve timing control. It is especially effective in increasing valve lift due to the reversal of the rear cam's rotation direction, which creates additional operating clearance between cam lobes and results in improved engine responsiveness and power output. Installation requires material removal from the inner surface of the stock gear cover, along with the use of professional tools such as a hydraulic press. S&S recommends pairing this kit with an adjustable pushrod/cover kit for optimal performance and compatibility. The kit includes camshafts, a gear cover gasket, bearings, an oil passage block-off kit, retaining ring, o-ring, and both inner and outer gears, all manufactured in the USA. Due to the gear drive design, users may experience increased valve train noise, which is considered normal. Proper installation necessitates checking coil bind, valve-to-valve clearance, and valve-to-piston clearance to ensure safe and reliable operation. This comprehensive camshaft upgrade is ideal for riders seeking to maximize their Twin Cam engine's performance and durability with a trusted gear drive system.
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