Big Bore Cylinder Kit

S&S CYCLE Big Bore Cylinder Kit

S&S CYCLE
0931-1080
910-0844
Upgrade your Harley-Davidson with the Big Bore Cylinder Kit. This bolt-on kit requires no machining and includes everything needed for installation.
Hurry! only 4 items left in stock.
€1,378.28
This product is currently unavailable.
  Delivery policy

In stock items will be shipped within 1-3 days.

  Return policy

You can return the products within 14 days for a full refund, check our returns policy.

Big Bore Cylinder Kit

Upgrade your ride with the Big Bore Cylinder Kit, designed for a hassle-free installation. This kit is a bolt-on solution that does not require machining of the crankcase, allowing for easy setup.

Retain your original engine's serial numbers while enjoying enhanced performance with the MLS (multi-layered steel) head gaskets. The kit maintains the stock engine height, ensuring compatibility with your existing setup.

Included in the package is a stylish cam cover badge, along with all necessary gaskets and hardware required for installation. Proudly made in the USA, this cylinder kit is perfect for those looking to elevate their Harley-Davidson experience.

: 0931-1080
In Stock

Data sheet

Riding Style
Street
Type
Big Bore
Units
Kit
Color/Finish
Non-Highlighted Fins
Wrinkle Black
Bore Size Imperial
4.320"
Stroke Length Imperial
4.375"
Compression Ratio Imperial
11.0:1
Displacement
129"
Stroke Length
4,375"

Shipping Policy

Shipping Areas:

We ship to:

  • Spain (Peninsula and Balearic Islands)
  • European Union countries

We do not ship to the Canary Islands, Ceuta, or Melilla.

Shipping Times:

  • Spain (Peninsula): 2–4 business days
  • Balearic Islands: 3–5 business days
  • EU countries: 3–7 business days depending on destination

Shipping Costs:

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.

Order Processing:

Orders are processed within 1–2 business days after payment confirmation. Orders placed on weekends or public holidays are processed the next business day.

Delivery Issues:

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.

Return & Withdrawal Policy

Right of Withdrawal:

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.

Return Conditions:

  • Products must be unused, in original condition and packaging.
  • Return shipping costs are the responsibility of the customer, unless the product is defective or sent in error.
  • Refunds will be issued within 14 days of receiving the returned goods.

Items Excluded from Return:

  • Custom or personalized products
  • Sealed items that were unsealed after delivery and are unsuitable for return due to hygiene (e.g. cosmetics, personal care)
  • Digital content delivered electronically once download or streaming has begun

If you want to return an item, please contact us first to give you detailed instructions.