
S&S CYCLE 96" Sidewinder® Engine Performance 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.
The 96" Sidewinder® Engine Performance Kit is designed to enhance the performance of your Harley-Davidson bike. This kit includes a standard flywheel assembly, 3-5/8" bore cylinders, 9.75:1 pistons, rings, and gaskets, ensuring a comprehensive upgrade for your engine.
Note that this kit does not include the manifold, pushrods, or pushrod clips. It is made in the U.S.A. and requires that cases be bored to accept 3-5/8" bore cylinders. Additionally, a minor crankcase clearancing operation for the crankpin nut must be performed.
When installing S&S flywheels in 90-99 engines, ensure you use the 77-89 style pinion gear and oil pump drive gears for optimal performance.
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We do not ship to the Canary Islands, Ceuta, or Melilla.
Shipping costs are calculated automatically at checkout based on destination and weight.
Free shipping may be offered for qualifying orders, as specified on our website.
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.