Hey guys, I am trying to figure out the best location to install an H-PIPE on my Injen Super SES dual exhaust. Also what would be the best length in-between the two exhaust pipes for the setup to function properly. Will I loose any previous gains? I have done a lot of research and came to the conclusion than an H or X pipe is necessary to equalize both sides of the exhaust due to the firing order of the VQ. I would rather install an X pipe for better flow and reduced noise like the Stillen kit but due to the design of my exhaust it does not seem easy. I do not know if anyone has done this before, if so your input would be greatly appreciated. Thanks!

 

http://https://my350z.com/forum/showthread.php?t=189946

I would read up on this article about the advantage of an X over an H pipe, seems the H pipe wouldnt have the same advantages as an X. Would an H be better than nothing at all? maybe to some degree but is it worth cutting up your exhaust for a minimal gain if you cannot put in the best feature (the X-pipe)?

Personally I would try and find a way to put an X pipe in if possible, if not just leave it well enough alone.

 

Put the H-pipe where Injen does: just before the resonators.
How long is the H-pipe? The other pipes are fixed in place so you don't have much choice about length.

 

I told my local exhaust shop to weld a pipe in the same location as the above pic AKA: New version of the Injen Exhaust and the idiots instead took the easy route and welded a long pipe way in front of that, almost directly after the cats. It deff. eliminated the raspy high note when in high rpm but I think it might be hurting me as far as any gains in HP and TQ where it is now. Any suggestions, should I go back and tell them to do it right?

 

A photo would be helpful but...

Effect on horsepower and torque? None. The pipe is too long for exhaust gas to travel from one side to the other. Performance wise I say that the net result is zero.

 

Thanks for the info, ill go back there 2morrow and make them do it right, I am kinda glad though that it eliminated the rasp and di quite it down some. I will let you guys know what happens 2morrow. Thanks!