Engine Case — 4.125" bore, 88 A engine, Wrinkle Black

S&S CYCLE Engine Case — 4.125" bore, 88 A engine, Wrinkle Black – 99-06 Touring, 00-06 Softail, 99-05 Dyna, 01-02 CVO

S&S CYCLE
0920-0188
31-0181A

Replacement Twin Cam 'A' engine cases for stock H-D chassis; greater strength than stock crankcases. Not for '06 Dyna.

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Replacement Twin Cam "A" engine cases for stock H-D chassis (carb and EFI), built for greater strength and durability. 🔧

Features strong, dependable Timken®-style sprocket shaft bearings and O-ring sealed passages between the crankcase and cam support plate to prevent leaks. 🛡️

  • Compatible with most stock components; rear motor mount bolts directly to the stock transmission and integrates with the stock primary and charging system.
  • Includes crankcase breather reed valve designed to eliminate oil carry-over and oil scavenging problems.
  • Large cam chest allows cam lift up to 0.675" without clearancing.

Made in the USA. This project requires a skilled technician; the assembler is responsible for checking all clearances and assembly specifications. Not for '06 Dyna.

: 0920-0188
In Stock

Data sheet

Units
Each
Color/Finish
Wrinkle Black
Brand
S&S CYCLE
Bore Size
4,125"
Material
356 T-6 Aluminum
Harley Family
CVO
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 1999
Harley Davidson Road King Classic Touring 2000
Harley Davidson Road King Classic Touring 2001
Harley Davidson Road King Classic Touring 2002
Harley Davidson Road King Touring 2001
Harley Davidson Road King Touring 2002
Harley Davidson Road King Touring 2003
Harley Davidson Road King Touring 2006
Harley Davidson Road King Custom Touring 2005
Harley Davidson Road King Custom Touring 2006
Harley Davidson Electra Glide Touring 2000
Harley Davidson Electra Glide Touring 2002
Harley Davidson Electra Glide Touring 2003
Harley Davidson Electra Glide Touring 2005
Harley Davidson Electra Glide Classic Touring 2002
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Classic Touring 1999
Harley Davidson Electra Glide Classic Touring 2000
Harley Davidson Electra Glide Classic Touring 2004
Harley Davidson Electra Glide Ultra Classic Touring 2001
Harley Davidson Electra Glide Ultra Classic Touring 2005
Harley Davidson Electra Glide Ultra Classic Touring 2006
Harley Davidson Electra Glide Touring 2005
Harley Davidson Heritage Softail Classic Softail 2001
Harley Davidson Heritage Softail Classic Softail 2003
Harley Davidson Heritage Softail Classic Softail 2005
Harley Davidson Fat Boy Softail 2000
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2002
Harley Davidson Fat Boy Softail 2001
Harley Davidson Fat Boy Softail 2003
Harley Davidson Fat Boy Softail 2004
Harley Davidson Fat Boy Softail 2006
Harley Davidson Heritage Softail Softail 2006
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 2006
Harley Davidson Softail Springer Classic Softail 2005
Harley Davidson Heritage Softail Springer Softail 2003
Harley Davidson Road Glide Touring 2003
Harley Davidson Road Glide Touring 1999
Harley Davidson Road Glide Touring 2003
Harley Davidson Road Glide Touring 2005
Harley Davidson Dyna Super Glide Dyna 1999
Harley Davidson Dyna Super Glide Dyna 2002
Harley Davidson Dyna Super Glide Dyna 2004
Harley Davidson Dyna Super Glide Custom Dyna 2005
Harley Davidson Dyna Super Glide Custom Dyna 2005
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 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 Limited Edition CVO 2001
Harley Davidson Dyna Wide Glide Limited Edition CVO 2002
Harley Davidson Dyna Wide Glide Dyna 2004
Harley Davidson Dyna Wide Glide Dyna 2005
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 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 Softail Softail 2001
Harley Davidson Softail Softail 2002
Harley Davidson Softail Softail 2004
Harley Davidson Softail Softail 2005
Harley Davidson Softail Softail 2006
Harley Davidson Softail Night Train Softail 2001
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 2002
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2006
Harley Davidson Softail Springer Softail 2004
Harley Davidson Softail Springer Softail 2005
Harley Davidson Softail Springer Softail 2006