Big Bore Forged Piston Kit — 3.937" bore, 4" stroke, 98" displacement, 10.3:1 compression

S&S CYCLE Big Bore Forged Piston Kit — 3.937" bore, 4" stroke, 98" displacement, 10.3:1 compression – 99-06 Touring, 00-06 Softail, 99-06 Dyna

S&S CYCLE
0910-4524
920-0101
Forged piston kit for '99–'06 Twin Cam big-bore conversions. Compatible with stock rods with tapered wristpin ends. Cylinders may be bored to fit.
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Forged pistons engineered for big-bore conversions on '99–'06 Twin Cam models.

Compatible with stock connecting rods that have tapered wristpin ends for straightforward installation.

Cylinders may be bored to accept larger pistons; machine to nominal diameter within ±0.0005" tolerance for correct piston-to-cylinder clearance.

Deck height is 1.265"; follow machinist specifications during assembly to ensure intended ring fit and performance.

Sold as a complete piston kit and intended for professional installation where appropriate.

: 0910-4524
In Stock

Data sheet

Units
Kit
Style
Big Bore
Brand
S&S CYCLE
Bore - Oversize
Standard
Piston Material
Forged
Bore Size
3,937"
Displacement
98"
Stroke Length
4"
Compression Ratio
10.3:1
Harley Family
Dyna
Softail
Touring

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

Manufacturer Model Family Year Notes
Harley Davidson Road King Classic Touring 2004
Harley Davidson Road King Classic Touring 2003
Harley Davidson Road King Classic Touring 2006
Harley Davidson Road King Touring 1999
Harley Davidson Road King Touring 2006
Harley Davidson Road King Custom Touring 2004
Harley Davidson Road King Custom Touring 2006
Harley Davidson Road King Custom Touring 2004
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2006
Harley Davidson Electra Glide Touring 2001
Harley Davidson Electra Glide Touring 2006
Harley Davidson Electra Glide Classic Touring 2003
Harley Davidson Electra Glide Classic Touring 2005
Harley Davidson Electra Glide Classic Touring 2005
Harley Davidson Electra Glide Ultra Classic Touring 1999
Harley Davidson Electra Glide Ultra Classic Touring 2000
Harley Davidson Electra Glide Ultra Classic Touring 2002
Harley Davidson Electra Glide Ultra Classic Touring 2004
Harley Davidson Electra Glide Ultra Classic Touring 2006
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Heritage Softail Classic Softail 2002
Harley Davidson Heritage Softail Classic Softail 2006
Harley Davidson Fat Boy Softail 2005
Harley Davidson Fat Boy Softail 2006
Harley Davidson Fat Boy Softail 2006
Harley Davidson Fat Boy 15th Anniversary Softail 2005
Harley Davidson Heritage Softail Softail 2006
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Softail Deluxe Softail 2005
Harley Davidson Softail Deluxe Softail 2006
Harley Davidson Heritage Softail Springer Softail 2001
Harley Davidson Heritage Softail Springer Softail 2002
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Softail Springer Classic Softail 2006
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Heritage Softail Springer Softail 2003
Harley Davidson Road Glide Touring 2001
Harley Davidson Road Glide Touring 1999
Harley Davidson Dyna Super Glide Dyna 1999
Harley Davidson Dyna Super Glide Dyna 2002
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Street Bob Dyna 2006
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide 35th Anniversary Dyna 2006
Harley Davidson Dyna Low Rider Dyna 1999
Harley Davidson Dyna Low Rider Dyna 2000
Harley Davidson Dyna Low Rider Dyna 2002
Harley Davidson Dyna Low Rider Dyna 2003
Harley Davidson Dyna Low Rider Dyna 2004
Harley Davidson Dyna Low Rider Dyna 2005
Harley Davidson Dyna Low Rider Dyna 2006
Harley Davidson Dyna Wide Glide Dyna 1999
Harley Davidson Dyna Wide Glide Dyna 2000
Harley Davidson Dyna Wide Glide Dyna 2001
Harley Davidson Dyna Wide Glide Dyna 2002
Harley Davidson Dyna Wide Glide Dyna 2003
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
Harley Davidson Dyna Wide Glide Dyna 2006
Harley Davidson Dyna Super Glide Sport Dyna 1999
Harley Davidson Dyna Super Glide Sport Dyna 2000
Harley Davidson Dyna Super Glide Sport Dyna 2001
Harley Davidson Dyna Super Glide Sport Dyna 2002
Harley Davidson Dyna Super Glide Sport Dyna 2003
Harley Davidson Dyna Super Glide Sport Dyna 2004
Harley Davidson Dyna Super Glide Sport Dyna 2004
Harley Davidson Dyna Super Glide Sport Dyna 2005
Harley Davidson Dyna Super Glide T-Sport Dyna 2001
Harley Davidson Dyna Super Glide T-Sport Dyna 2002
Harley Davidson Dyna Super Glide T-Sport Dyna 2003
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2006
Harley Davidson Softail Night Train Softail 2002
Harley Davidson Softail Night Train Softail 2003
Harley Davidson Softail Night Train Softail 2005
Harley Davidson Softail Deuce Softail 2001
Harley Davidson Softail Deuce Softail 2003
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Deuce Softail 2006
Harley Davidson Softail Deuce Softail 2001
Harley Davidson Softail Deuce Softail 2002
Harley Davidson Softail Deuce Softail 2004
Harley Davidson Softail Deuce Softail 2005
Harley Davidson Softail Softail 2003
Harley Davidson Softail Softail 2005
Harley Davidson Softail Springer Softail 2000
Harley Davidson Softail Springer Softail 2001
Harley Davidson Softail Springer Softail 2002
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2006
Harley Davidson Softail Springer Softail 2003
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2006