STD High Performance Engine Cases

For nearly 30 years STD Development has been setting the standard for the world's strongest, highest quality aftermarket engine cases for Harley-Davidson stock replacement and high performance Big Twin and Sportster/Buell applications. If you're building the ultimate performance oriented street custom or racebike, STD Development is the first place to start. All STD cases are cast from aerospace quality 356 T6 "A" Prime alloy with a tensile strength of 45,880 psi, the highest rating of any aftermarket cases. All STD case assemblies are fully lined bored for accuracy. Most older Panhead and Shovelhead applications are upgraded with the latest Timken roller bearing in the LH case side and a needle cam bearing rather than the stock bushing.STD cases are available bare or complete and ready to run with studs and bearings as needed.

Here's how the strength of STD Cases compares to the competition. Performance counts from the ground up, and an STD engine case assembly is the only place to start.

STD Case Intro | Big Twin Cases | Big Bore 4.25" plus+ Cases | Cases for Sportster/Buell