Piston Kit — 3.937", 4-3/8", 11:1, 1746 cc

WISECO Piston Kit — 3.937", 4-3/8", 11:1, 1746 cc – 18-19 Softail, 17-19 Touring, 17-19 Trike

WISECO
0903-1551
K2784

ArmorX™-coated pistons with ArmorFit™ skirt coating for smooth, quiet operation. Includes pistons, rings, pins and circlips. Made in the U.S.A.

Out of Stock
€327.99
€443.91
Save €115.92
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.

🔧 Upgrade your engine with a premium piston kit engineered for durability and smooth operation.

  • ArmorX™ piston coating for superior protection in extreme conditions and reduced wear.
  • ArmorFit™ skirt coating auto-adjusts to the cylinder wall for smooth, quiet, trouble-free operation.
  • Domed piston head design to improve flame travel and maximize air/fuel burn efficiency.
  • Superfinish piston pin and enhanced pin oiling to reduce friction and improve lubrication.
  • Augmented ring land details and dedicated rings for improved seal, compression and oil control.
  • Fits OEM and Screamin’ Eagle cylinder heads.
  • Kit includes two pistons, rings, piston pins and circlips.
  • Made in the U.S.A. 🇺🇸

Designed for reliable performance under demanding conditions, this kit delivers long service life and straightforward installation.

: 0903-1551
Out of Stock

Data sheet

Units
Kit
Brand
WISECO
Skirt Coating
ArmorFit™
Bore - Oversize
Standard
Piston Material
ArmorX™
Bore Size
3,937"
Compression Ratio Imperial
11.0:1
Displacement
1746 cc
Piston Head Shape
Domed
Stroke Length
4-3/8"
Bore Oversize - Imperial
Standard
Compression Ratio
11.0:1
Harley Family
Softail
Touring
Trike

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.

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Softail Deluxe 107 Softail 2018
Harley Davidson Softail Deluxe 107 Softail 2019
Harley Davidson Softail Fat Boy 107 Softail 2018
Harley Davidson Softail Fat Boy 107 Softail 2019
Harley Davidson Softail Heritage Classic 107 Softail 2018
Harley Davidson Softail Heritage Classic 107 Softail 2019
Harley Davidson Road King 107 Touring 2017
Harley Davidson Road King 107 Touring 2018
Harley Davidson Road King 107 Touring 2019
Harley Davidson Road King 107 Touring 2017
Harley Davidson Road King 107 Touring 2018
Harley Davidson Road King 107 Touring 2019
Harley Davidson Road King Classic 107 Touring 2017
Harley Davidson Road King Classic 107 Touring 2018
Harley Davidson Road King Classic 107 Touring 2019
Harley Davidson Road King Special 107 Touring 2017
Harley Davidson Road King Special 107 Touring 2018
Harley Davidson Road King Special 114 Touring 2019
Harley Davidson Electra Glide Ultra Classic 107 Touring 2017
Harley Davidson Electra Glide Ultra Classic 107 Touring 2018
Harley Davidson Electra Glide Ultra Classic 107 Touring 2019
Harley Davidson Trike Tri Glide Ultra Classic 107 Trike 2017
Harley Davidson Tri Glide Ultra Anniversary 107 Trike 2018
Harley Davidson Tri Glide Ultra 107 Trike 2019
Harley Davidson Electra Glide Ultra Limited 107 Touring 2017
Harley Davidson Ultra Limited Shrine Edition 107 Touring 2018
Harley Davidson Ultra Limited Shrine Edition 114 Touring 2019
Harley Davidson Electra Glide Ultra Limited Low 107 Touring 2017
Harley Davidson Ultra Limited Low 107 Touring 2018
Harley Davidson Ultra Limited Low 114 Touring 2019
Harley Davidson Street Glide 107 Touring 2017
Harley Davidson Street Glide 107 Touring 2018
Harley Davidson Street Glide 107 Touring 2019
Harley Davidson Street Glide 107 Touring 2017
Harley Davidson Street Glide Anniversary 107 Touring 2018
Harley Davidson Street Glide 107 Touring 2019
Harley Davidson Street Glide Special 107 Touring 2017
Harley Davidson Street Glide Special Anniversary 107 Touring 2018
Harley Davidson Street Glide Special 114 Touring 2019
Harley Davidson Freewheeler 107 Trike 2017
Harley Davidson Freewheeler 107 Trike 2018
Harley Davidson Freewheeler 107 Trike 2019
Harley Davidson Softail Sport Glide 107 Softail 2018
Harley Davidson Softail Sport Glide 107 Softail 2019
Harley Davidson Softail Slim 107 Softail 2018
Harley Davidson Softail Slim 107 Softail 2019
Harley Davidson Road Glide Ultra 107 Touring 2017
Harley Davidson Road Glide Ultra 107 Touring 2018
Harley Davidson Road Glide Ultra 114 Touring 2019
Harley Davidson Road Glide 107 Touring 2017
Harley Davidson Road Glide 107 Touring 2018
Harley Davidson Road Glide 107 Touring 2019
Harley Davidson Road Glide 107 Touring 2017
Harley Davidson Road Glide 107 Touring 2018
Harley Davidson Road Glide 107 Touring 2019
Harley Davidson Road Glide Special 107 Touring 2017
Harley Davidson Road Glide Special 107 Touring 2018
Harley Davidson Road Glide Special 114 Touring 2019
Harley Davidson Softail Street Bob 107 Softail 2018
Harley Davidson Softail Street Bob 107 Softail 2019
Harley Davidson Softail Breakout 107 Softail 2018
Harley Davidson Softail Breakout 107 Softail 2019
Harley Davidson Softail Fat Bob 107 Softail 2018
Harley Davidson Softail Fat Bob 107 Softail 2019
Harley Davidson Softail Low Rider 107 Softail 2018
Harley Davidson Softail Low Rider 107 Softail 2019