BBK is made by Edelbrock, and they're not bad, but I think their parts are better for the 5.0, Edelbrock is kinda all about the old school stuff(although their 4.6 cobra full-length headers are pretty bad-ass).
I've heard that the Dr. Gas X-Pipe is the best for the new cobras.
If you are going OFF-ROAD (e.g no cats) then the H-pipe has yielded the best results (MAC off-raod H).
If you want to stay emissions legal, then the Bassani X-pipe w/ high flow cats is your best option.
The off-road H is good for 3 or 4 more rwhp than the off-road X. But, quick-snake is correct, the dr. gas x pipe (which has no cats) is better than the bassani x-pipe (with no cats). But, like I said...if you are going off-road....you should use the h-pipe. The only advantage of using an off-road X-pipe is that its quierter than the off-road H pipe.
