Replacement Piston — 3.875 in diameter, 4.375 in stroke, 9.6:1

DRAG SPECIALTIES Replacement Piston — 3.875 in diameter, 4.375 in stroke, 9.6:1 – 12-14 Dyna, 11-14 Touring, 10-11, 13 Trike, 12-14 Softail

DRAG SPECIALTIES
0911-0021
21989-07

OEM-quality replacement piston kit. Includes two pistons, wrist pins and clips. Accepts OEM or Hastings rings.

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€110.11
€121.90
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🔧 OEM-quality cast alloy construction provides dependable performance and long service life.

✨ Some fitments feature a coated design that extends piston life, reduces friction, and helps engines run cooler.

Economical and ideal for OEM replacement; kits include two pistons, wrist pins and clips.

Accepts OEM or Hastings rings (order separately).

: 0911-0021
In Stock

Data sheet

Brand
DRAG SPECIALTIES
Bore - Oversize
Standard
Bore Size
3,875"
Compression Ratio
9.6:1
Harley Family
Dyna
Softail
Touring
Trike

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 2012
Harley Davidson Dyna Switchback Dyna 2014
Harley Davidson Road King Touring 2013
Harley Davidson Road King Touring 2014
Harley Davidson Road King Touring 2012
Harley Davidson Road King Touring 2013
Harley Davidson Road King Classic Touring 2011
Harley Davidson Road King Classic Touring 2013
Harley Davidson Road King Classic Touring 2014
Harley Davidson Electra Glide Classic Touring 2013
Harley Davidson Electra Glide Classic Touring 2011
Harley Davidson Electra Glide Classic Touring 2012
Harley Davidson Electra Glide Ultra Classic Touring 2012
Harley Davidson Electra Glide Ultra Classic Touring 2012
Harley Davidson Trike Tri Glide Ultra Classic Trike 2010
Harley Davidson Trike Tri Glide Ultra Classic Trike 2011
Harley Davidson Trike Tri Glide Ultra Classic 110th Anniversary Trike 2013
Harley Davidson Electra Glide Ultra Limited Touring 2012
Harley Davidson Electra Glide Ultra Limited Touring 2013
Harley Davidson Street Glide Touring 2011
Harley Davidson Street Glide Touring 2014
Harley Davidson Street Glide Touring 2012
Harley Davidson Street Glide Touring 2013
Harley Davidson Street Glide Touring 2014
Harley Davidson Street Glide Special Touring 2014
Harley Davidson Softail Slim Softail 2014
Harley Davidson Softail Slim Softail 2012
Harley Davidson Softail Slim Softail 2013
Harley Davidson Softail Slim Softail 2014
Harley Davidson Heritage Softail Classic Softail 2012
Harley Davidson Heritage Softail Classic Softail 2013
Harley Davidson Fat Boy Softail 2012
Harley Davidson Fat Boy Softail 2014
Harley Davidson Fat Boy Lo Softail 2012
Harley Davidson Fat Boy Special Softail 2012
Harley Davidson Fat Boy Special Softail 2013
Harley Davidson Fat Boy Lo Softail 2014
Harley Davidson Softail Deluxe Softail 2012
Harley Davidson Softail Deluxe Softail 2013
Harley Davidson Softail Deluxe Softail 2012
Harley Davidson Softail Deluxe Softail 2013
Harley Davidson Road Glide Ultra Touring 2012
Harley Davidson Road Glide Ultra Touring 2013
Harley Davidson Road Glide Custom Touring 2011
Harley Davidson Road Glide Custom Touring 2012
Harley Davidson Road Glide Custom Touring 2013
Harley Davidson Road Glide Custom Touring 2011
Harley Davidson Road Glide Custom Touring 2012
Harley Davidson Dyna Street Bob Dyna 2014
Harley Davidson Dyna Super Glide Custom Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Low Rider Dyna 2014
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 Blackline Softail 2013
Harley Davidson Blackline Softail 2012
Harley Davidson Blackline Softail 2013
Harley Davidson Breakout Softail 2013