128" Power Package Engine Performance Kit

S&S CYCLE 128" Power Package Engine Performance Kit

S&S CYCLE
0904-0070
310-1106A
Upgrade your Harley-Davidson engine with the 128" Power Package Engine Performance Kit for enhanced performance and reliability.
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€2,765.38
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.

Enhance your Harley-Davidson's performance with the 128" Power Package Engine Performance Kit. This kit includes a Big Bore Kit that increases the displacement from 114"/117" to 128" without the need for case machining. Featuring 4-1/4" bore cylinders equipped with 11:1 forged pistons, it ensures optimal power delivery.

The S&S oil pump and cam plate with a blue anodized finish provide reliable oil flow, while the removable passage plugs allow for easy servicing. With independent scavenge sections for the flywheel cavity and cam chest, along with debris screens in both pickups, this kit enhances engine longevity.

Included are adjustable pushrods, S&S premium tappets, and hard-anodized tappet cuffs to improve stability in high-lift, high-rpm situations. The S&S 550 cams are designed specifically for big bore applications, complemented by S&S valve springs that support lifts up to .605".

All necessary gaskets, bearings, and hardware for a bolt-on installation are included, making this kit a complete solution for your engine upgrade. Proudly made in the U.S.A.

: 0904-0070
In Stock

Data sheet

Riding Style
Street
Type
Engine
Units
Kit
Color/Finish
Non-Highlighted Fins
Wrinkle Black
Style
Big Bore
Bore Size Imperial
4.250"
Stroke Length Imperial
4.50"
Compression Ratio Imperial
11.1:1
Displacement
128"
Cooling System
Oil Cooled
Cam Drive Type
Gear

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.