S&S 4.125" Bore Black T-6 Aluminum Alternator-Style Crankcase (310-0878)
- Stock or 4-1/8" bore crankcases to be used as a foundation for a custom engine or replacement for T111, T124, or T143
- Stock looking, but stronger; thicker wall sections and superior 356-T6 aircraft grade aluminum
- Tough powder coat finishes
- Reinforced front motor mount for extra strength
- Timken sprocket shaft bearing - Strong enough for the most demanding applications
- Clearanced for strokes up to 4-3/16" and cams up to .720" lift
- Includes pinion and Timken bearing
- Manufacturer's Statement of Origin (MSO) included
- Includes studs and cam bearings installed
- Crankcases are specially machined for the new S&S oil line installation kits sold separately
- For 2006-'17 HD Dyna Models with Stock Bore, Alternator Style.
- Made in the U.S.A.
- Requires Oil supply line installation kit PART #s 0950-0848 or 0950-0849.
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 2008-2017 | Harley-Davidson | Dyna Fat Bob FXDF | |
| 2006 | Harley-Davidson | Dyna Low Rider EFI FXDLI | |
| 2007-2009 | Harley-Davidson | Dyna Low Rider FXDL | |
| 2014-2017 | Harley-Davidson | Dyna Low Rider FXDL | |
| 2006 | Harley-Davidson | Dyna Street Bob EFI FXDBI | |
| 2007-2017 | Harley-Davidson | Dyna Street Bob FXDB | |
| 2006 | Harley-Davidson | Dyna Super Glide 35th Anniversary FXD | |
| 2006 | Harley-Davidson | Dyna Super Glide Custom EFI FXDCI | |
| 2007-2014 | Harley-Davidson | Dyna Super Glide Custom FXDC | |
| 2006 | Harley-Davidson | Dyna Super Glide EFI FXDI | |
| 2007-2010 | Harley-Davidson | Dyna Super Glide FXD | |
| 2012-2016 | Harley-Davidson | Dyna Switchback FLD | |
| 2006 | Harley-Davidson | Dyna Wide Glide EFI FXDWGI | |
| 2007-2008 | Harley-Davidson | Dyna Wide Glide FXDWG | |
| 2010-2017 | Harley-Davidson | Dyna Wide Glide FXDWG | |