96" Sidewinder® Engine Performance Kit

S&S CYCLE 96" Sidewinder® Engine Performance Kit

S&S CYCLE
0903-1258
91-7661
Enhance your Harley-Davidson's performance with the 96" Sidewinder® Engine Performance Kit, featuring high-quality components for a complete upgrade.
Hurry! only 4 items left in stock.
€2,049.33
In stock, ships within 24-48 hours.
Quantity

  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.

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.

: 0903-1258
: 4 Items
In Stock

Data sheet

Riding Style
Street
Type
Engine
Units
Kit
Color/Finish
Black
Style
Big Bore
Bore Size Imperial
3.625"
Stroke Length Imperial
4-5/8"
Compression Ratio Imperial
9.75:1
Displacement
96"

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.