Originally Posted by pitpop

I think the 2066 was originally for the US Spec? I will see if we can test with that pipe and give you some feedback. The Alphas seem to like a more free breathing pipe, so I can't imagine the 2066 to be performing better than 2013 or 2058.

Let me tell you, the engines have changed SO much since your EVO4 and the previous engines. This newest generation of Team Orion Alpha has absolutely no parts in common with the older engines. Completely redesigned combustion chamber, totally different porting and timing, different materials in the piston and crank case, new aluminum body carburetor made specifically for Team Orion... wholesale changes to the point there is nothing in common with the engines from 2 years ago.