Rossoh U.S. dist website racefactorindustries.com
Amain has the same selection as other stores but they carry more spares then other shops.
The black headed engine was early stock .28 and is not available in the U.S.
Yes the cat is out of the bag the factory is currently working on a 3port race engine. There is no release date set yet and it is still being tested. Early reports suggest that this engine will rip and will also be a little cheaper then the 5port engine.