Any real benefit to an H pipe compared to regular dual exhaust?

jerry S said:

Well, I just did some internet research and my preliminary conclusion is that between the X and the H, the H is the better way to go. First, I found a tech note from Flowmaster's FAQ. Have a look

Do I need to install an "H" pipe to my dual exhaust?
Flowmaster strongly recommends using an "H" pipe, commonly known as a "balance tube" on all "true dual" exhaust systems. An "H" pipe equalizes the pressures between both banks of the engine giving a broader and flatter torque curve throughout the rpm range. It also eliminates "back-rap" common on deceleration, and creates a deeper mellower tone both inside and outside of the vehicle.

Is an "X" pipe better than and "H" pipe?
Over the years, Flowmaster's testing of all types of crossovers, including "X pipes", has revealed no substantial benefits over a properly installed "H" pipe on street driven applications. However, in race applications with small cubic inch engines and /or restricted (small bore) carburetors, will respond well to the addition of X pipes, tri-y styled collectors and/or properly designed single exhaust systems.

Then, I found an article from Mustang 50Monthly in which an X and an H were tested side by side. The H came out on top.

http://www.mustang50magazine.com/techarticles/4376/index.html

Finally,, the H is easier to install on my current set up. Just cut and weld. More work would be involved to get the X to fit.

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