Big Bore Forged Piston Kit — Bore 3.937", Stroke 4-3/8", Compression 10.4:1, Displacement 107"

S&S CYCLE Big Bore Forged Piston Kit — Bore 3.937", Stroke 4-3/8", Compression 10.4:1, Displacement 107" – 07-17 Dyna, 07, 10, 14-16 Touring, 07-15 Softail

S&S CYCLE
0910-4526
920-0100

Durable forged pistons for big bore builds. Compatible with stock rods with tapered wristpin ends. Cylinders may be bored to fit; machine to nominal diameter for correct clearance.

Hurry! only 10 items left in stock.
€472.00
€593.37
Save €121.37
local_shipping In stock, ships in 20-25 days
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 Big Bore Forged Piston Kit provides durable, forged pistons designed for high-performance and long-lasting service. ⚙️🔥

  • Pistons are compatible with stock rods with tapered wristpin ends
  • Stock cylinders may be bored to accommodate larger piston
  • Bore cylinders to nominal diameter ±0.0005" for correct clearance

For best results, have cylinders checked and bored by a machine shop and verify ring end gaps and wristpin fit during assembly. Professional installation recommended.

: 0910-4526
: 10 Items
In Stock

Data sheet

Brand
S&S CYCLE
Bore - Oversize
Standard
Bore Size
3,937"
Compression Ratio
10.4:1

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 Dyna Switchback Dyna 2012
Harley Davidson Dyna Switchback Dyna 2013
Harley Davidson Dyna Switchback Dyna 2012
Harley Davidson Dyna Switchback Dyna 2013
Harley Davidson Dyna Switchback Dyna 2014
Harley Davidson Dyna Switchback Dyna 2015
Harley Davidson Dyna Switchback Dyna 2016
Harley Davidson Road King Classic Touring 2007
Harley Davidson Road King Classic Touring 2014
Harley Davidson Road King Classic Touring 2015
Harley Davidson Road King Classic Touring 2016
Harley Davidson Electra Glide Touring 2010
Harley Davidson Electra Glide Touring 2010
Harley Davidson Electra Glide Ultra Classic Touring 2007
Harley Davidson Softail Slim Softail 2012
Harley Davidson Softail Slim Softail 2013
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Harley Davidson Softail Slim Softail 2015
Harley Davidson Softail Slim Softail 2012
Harley Davidson Softail Slim Softail 2013
Harley Davidson Softail Slim Softail 2014
Harley Davidson Softail Slim Softail 2015
Harley Davidson Heritage Softail Classic Softail 2008
Harley Davidson Heritage Softail Classic Softail 2010
Harley Davidson Heritage Softail Classic Softail 2011
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Harley Davidson Heritage Softail Classic Softail 2012
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Harley Davidson Fat Boy Softail 2010
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Harley Davidson Fat Boy Softail 2013
Harley Davidson Fat Boy Softail 2014
Harley Davidson Fat Boy Softail 2012
Harley Davidson Fat Boy Softail 2013
Harley Davidson Fat Boy Softail 2014
Harley Davidson Fat Boy Softail 2015
Harley Davidson Fat Boy Special Softail 2010
Harley Davidson Fat Boy Lo Softail 2011
Harley Davidson Fat Boy Special Softail 2011
Harley Davidson Fat Boy Lo Softail 2012
Harley Davidson Fat Boy Lo Softail 2013
Harley Davidson Fat Boy Special Softail 2012
Harley Davidson Fat Boy Special Softail 2013
Harley Davidson Fat Boy Special Softail 2014
Harley Davidson Fat Boy Special Softail 2015
Harley Davidson Softail Deluxe Softail 2007
Harley Davidson Softail Deluxe Softail 2009
Harley Davidson Softail Deluxe Softail 2010
Harley Davidson Softail Deluxe Softail 2011
Harley Davidson Softail Deluxe Softail 2011
Harley Davidson Softail Deluxe Softail 2012
Harley Davidson Softail Deluxe Softail 2013
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Harley Davidson Softail Deluxe Softail 2013
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Harley Davidson Softail Deluxe Softail 2015
Harley Davidson Cross Bones Softail 2008
Harley Davidson Cross Bones Softail 2009
Harley Davidson Cross Bones Softail 2010
Harley Davidson Cross Bones Softail 2011
Harley Davidson Softail Springer Classic Softail 2007
Harley Davidson Road Glide Touring 2007
Harley Davidson Road Glide Touring 2010
Harley Davidson Road Glide Touring 2010
Harley Davidson Road Glide Custom Touring 2010
Harley Davidson Road Glide Custom Touring 2010
Harley Davidson Rocker Softail 2008
Harley Davidson Rocker Softail 2009
Harley Davidson Rocker C Softail 2008
Harley Davidson Rocker C Softail 2009
Harley Davidson Rocker C Softail 2010
Harley Davidson Rocker C Softail 2011
Harley Davidson Rocker C Softail 2011
Harley Davidson Dyna Super Glide Dyna 2007
Harley Davidson Dyna Super Glide Dyna 2008
Harley Davidson Dyna Super Glide Dyna 2009
Harley Davidson Dyna Super Glide Dyna 2010
Harley Davidson Dyna Street Bob Dyna 2007
Harley Davidson Dyna Street Bob Dyna 2008
Harley Davidson Dyna Street Bob Dyna 2009
Harley Davidson Dyna Street Bob Dyna 2010
Harley Davidson Dyna Street Bob Dyna 2011
Harley Davidson Dyna Street Bob Dyna 2012
Harley Davidson Dyna Street Bob Dyna 2013
Harley Davidson Dyna Street Bob Dyna 2012
Harley Davidson Dyna Street Bob Dyna 2013
Harley Davidson Dyna Street Bob Dyna 2014
Harley Davidson Dyna Street Bob Dyna 2015
Harley Davidson Dyna Street Bob Dyna 2016
Harley Davidson Dyna Street Bob Dyna 2017
Harley Davidson Dyna Street Bob Dyna 2014
Harley Davidson Dyna Street Bob Dyna 2015
Harley Davidson Dyna Street Bob Dyna 2016
Harley Davidson Dyna Street Bob Dyna 2017
Harley Davidson Dyna Street Bob Limited Dyna 2013
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Harley Davidson Dyna Street Bob Limited Dyna 2013
Harley Davidson Dyna Street Bob Limited Dyna 2013
Harley Davidson Dyna Street Bob Special Dyna 2014
Harley Davidson Dyna Street Bob Special Dyna 2015
Harley Davidson Dyna Street Bob Special Dyna 2014
Harley Davidson Dyna Street Bob Special Dyna 2015
Harley Davidson Dyna Street Bob Limited Dyna 2016
Harley Davidson Dyna Street Bob Limited Dyna 2016
Harley Davidson Dyna Street Bob Factory Custom Dyna 2013
Harley Davidson Dyna Street Bob Factory Custom Dyna 2014
Harley Davidson Dyna Street Bob Factory Custom Dyna 2015
Harley Davidson Dyna Street Bob Factory Custom Dyna 2016
Harley Davidson Dyna Street Bob Factory Custom Dyna 2013
Harley Davidson Dyna Street Bob Factory Custom Dyna 2014
Harley Davidson Dyna Street Bob Factory Custom Dyna 2015
Harley Davidson Dyna Street Bob Factory Custom Dyna 2016
Harley Davidson Dyna Super Glide Custom Dyna 2007
Harley Davidson Dyna Super Glide Custom Dyna 2008
Harley Davidson Dyna Super Glide Custom Dyna 2009
Harley Davidson Dyna Super Glide Custom Dyna 2010
Harley Davidson Dyna Super Glide Custom Dyna 2011
Harley Davidson Dyna Super Glide Custom Dyna 2012
Harley Davidson Dyna Super Glide Custom Dyna 2013
Harley Davidson Dyna Super Glide Custom Dyna 2012
Harley Davidson Dyna Super Glide Custom Dyna 2013
Harley Davidson Dyna Super Glide Custom Dyna 2014
Harley Davidson Dyna Super Glide Custom Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2008
Harley Davidson Dyna Fat Bob Dyna 2009
Harley Davidson Dyna Fat Bob Dyna 2010
Harley Davidson Dyna Fat Bob Dyna 2011
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2015
Harley Davidson Dyna Fat Bob Dyna 2016
Harley Davidson Dyna Fat Bob Dyna 2017
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2015
Harley Davidson Dyna Fat Bob Dyna 2016
Harley Davidson Dyna Fat Bob Dyna 2017
Harley Davidson Dyna Low Rider Dyna 2007
Harley Davidson Dyna Low Rider Dyna 2008
Harley Davidson Dyna Low Rider Dyna 2009
Harley Davidson Dyna Low Rider Dyna 2014
Harley Davidson Dyna Low Rider Dyna 2015
Harley Davidson Dyna Low Rider Dyna 2016
Harley Davidson Dyna Low Rider Dyna 2017
Harley Davidson Dyna Low Rider Dyna 2014
Harley Davidson Dyna Low Rider Dyna 2015
Harley Davidson Dyna Low Rider Dyna 2016
Harley Davidson Dyna Low Rider Dyna 2017
Harley Davidson Dyna Wide Glide Dyna 2007
Harley Davidson Dyna Wide Glide 105th Anniversary Dyna 2008
Harley Davidson Dyna Wide Glide Dyna 2010
Harley Davidson Dyna Wide Glide Dyna 2011
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2013
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2013
Harley Davidson Dyna Wide Glide Dyna 2014
Harley Davidson Dyna Wide Glide Dyna 2015
Harley Davidson Dyna Wide Glide Dyna 2016
Harley Davidson Dyna Wide Glide Dyna 2017
Harley Davidson Blackline Softail 2011
Harley Davidson Blackline Softail 2011
Harley Davidson Blackline Softail 2012
Harley Davidson Blackline Softail 2012
Harley Davidson Blackline Softail 2013
Harley Davidson Blackline Softail 2012
Harley Davidson Blackline Softail 2013
Harley Davidson Breakout Softail 2013
Harley Davidson Breakout Softail 2013
Harley Davidson Breakout Softail 2014
Harley Davidson Breakout Softail 2015
Harley Davidson Softail Softail 2007
Harley Davidson Softail Night Train Softail 2007
Harley Davidson Softail Night Train Softail 2008
Harley Davidson Softail Night Train Softail 2009
Harley Davidson Softail Custom Softail 2007
Harley Davidson Softail Custom Softail 2008
Harley Davidson Softail Custom Softail 2009
Harley Davidson Softail Custom Softail 2010
Harley Davidson Softail Deuce Softail 2007