The H-pipe looks funny to me. Looks like it could have been better designed. Has anyone tried to get a custom piece made to replace the H-pipe? Like maybe a X-pipe like Stillen. The Stillen is making more torque and I think it is partly due to the X-pipe.

Let me know what you think.

Thanks,
Victor

 

I dont think it is. It is not meant to flow air through in the exhaust stream, just to equalize the pressure between the two sides.

 

I fully believe that the stillen's X-pipe is the reason it has the power and torque gains that it does, especially when we make note that stillen used 2.5" pipe diameter, which is awfully large for what is serving half of 3.5 liters of displacement and the borla uses a more senseable 2.25" diameter.

I found this explanation of what H-pipes do and what X-pipe's do

"H Pipe:

An H pipe helps equalize the exhaust pressures between the two banks of tubing as the hot gases and sound waves travel down the tubing. This, in effect, relieves the exhaust pressures as they travel through the H tubing, generally creating an increase in torque. This will also give an added sound reduction when the sound waves combine inside the H tubing.

X Pipe:

An X pipe will actually help to scavenge exhaust pulses from one bank as the opposite exhaust pulse passes through the X, thus creating a vacuum effect at the valve, resulting in a cleaner burn in the cylinder. This generally equals added torque and, like the H pipe, a reduction in sound as the sound waves combine in the X pipe.

 

Thanks guys!

 

Hmmm.. based on the definitions that Gcoupe35 gave both the H and X pipes reduce sound. I am wondering what the result would be if the H and/or X pipe was not used and straight pipes back to the muffler were used instead? Would the sound increase? Would it gain/lose hp and torque? Hmmmmmmmm.....

-Chrismcagle