Description
The S&S Cycle Super Stock Motor Case is the foundation of a reliable, high-output Harley engine build. This A356 T-6 aluminum casting delivers the precision machining and bearing support you need for consistent performance, whether you’re assembling a street cruiser or a dependable custom. Built in the USA with precision line-honed bearing races and optimized breather timing, it gives you the core you can trust when building from the ground up.
- A356 T-6 aluminum alloy
- Line-honed bearing races
- Precision-machined breather cavity
- Timken sprocket shaft bearings
- 1958+ pinion bearing compatible
- Fits 3.4375″ cylinders
- 1/4″-20 tapped provisions
- 5/16″ generator bolt holes
- Includes crankcase hardware
- Includes bearing assemblies
- Includes oil seals
- Includes breather fittings
- Includes oil pump bushings
- Magnetic drain plug included
- Installation instructions included
- Optimized oil scavenging design
- 66-69 alloy primary compatible
- Generator gear kit separate
- Made in USA
- MPN: 31-0010
