You're right on the money asheck. Improper backpressure is almost as bad as an air leak. I'm hoping these pipes are symetrical enough as to equalize each other and allow a good tune.
Worst case scenario it's a blubbering failure, then I seal off one side and only use one pipe. It actually states you can run one side or the other if you want to balance other components you may have on your car, or run 'em both for balls to the walls power.
We should all know in a week or two, I'll let y'all know
