The primary business of S&S is performance parts and engines based on the Harley-Davidson engine architecture. In the motorcycle world, the X-wedge engine, which has been around since about 2007, didn't really catch on with the custom bike builder crowd, and had very little application with the OEMs (low volume Confederate and Big Dog brands come to mind). Though it is compatible with H-D type primary drives, the much larger engine size (exacerbated by the larger V angle) and different case mounting arrangement means it will not fit in frames designed for the H-D engine. So it appears the engine has not gained acceptance more because it's different rather than because it's inferior. As far as I can find online, Morgan is the only purchaser of X-wedges in any volume at present.
