
S&S CYCLE 635 H.O. Gear Drive Camshaft Kit
In stock items will be shipped within 1-3 days.
You can return the products within 14 days for a full refund, check our returns policy.
We accept many payment methods

In stock items will be shipped within 1-3 days.
You can return the products within 14 days for a full refund, check our returns policy.
Enhance your engine's performance with the 635 H.O. Gear Drive Camshaft Kit. This innovative kit reverses the rear cam's direction of rotation, allowing for additional operating clearance between cam lobes. As a result, higher cam lifts are achievable, making it perfect for modified engines with a displacement of 106" or greater and compression ratios between 10.0:1 to 11.0:1.
Key features include:
The kit includes camshafts, inner gear, outer gear drives, inner bearings, outer bearings, gaskets, and detailed instructions. Please ensure to check coil bind, valve to valve clearance, and valve to piston clearance during installation. Due to the inherent characteristics of gear drives, you may experience increased valve train noise. Proudly made in the USA.
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Orders are processed within 1–2 business days after payment confirmation. Orders placed on weekends or public holidays are processed the next business day.
If your order is delayed or arrives damaged, you must notify us within 14 calendar days. We will investigate the issue and offer a resolution in accordance with applicable consumer protection laws.
In accordance with Royal Legislative Decree 1/2007 (Ley de Defensa de los Consumidores y Usuarios), you have the right to withdraw from your purchase within 14 calendar days from the date of receipt, without giving any reason.
To exercise this right, contact us via email or through our website, providing your order number and contact details.
If you want to return an item, please contact us first to give you detailed instructions.