
S&S CYCLE Big Bore Cylinder 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.
Upgrade your performance with the Big Bore Cylinder Kit, designed to yield excellent results with stock cylinder heads. This kit offers an easy installation process, allowing you to swap the cylinders without the need to bore or split existing cases (unless otherwise noted).
The cylinders are constructed from premium aluminum castings featuring cast-in iron liners, ensuring durability and reliability. Each kit includes everything you need for a successful installation: cylinders, pistons, rings, and gaskets (head, base, and exhaust).
All components are proudly made in the U.S.A. Please note that this project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications to ensure optimal performance.
We ship to:
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.