I see it seems like everybody is using the X pipe design i went ahead and started mocking up an exhaust for an H pipe design is there a reason or just because "sound quality" (preferences of people) or simplicity or does it have something to do with clearance?

 

the reason most people go with an X-pipe over an H-pipe is that you can get more scavenging out of it and a bit more power. from what I've heard the H-pipe is more for sound than anything and slightly better performance wise than true duals. The X-pipe probably will get you 5 HP depending on your set up. Its cheap power if your already doing exhaust but definitely not a reason to do exhaust IMO. If I was you I would try to put in the X-pipe but if I couldnt fit it I wouldnt loose any sleep. Exhaust is one of those topics where if you dont like the answer you get, wait 5 minutes and you'll get a different one.

 

I've done both. Same mufflers, 3 "pipe, and LTs. The H pipe sounded 100x better. Smoother and less rasp.

 

Loved my H-pipe true dual setup. Sadly i lived on a crappy backroad during that time and they constantly took a beating. I dumped a true dual set up for my loudmouth, the H-pipe was easier to set up than a x-pipe imo and i doubt you will see much power difference.

 

The "H" pipe is supposed to smooth out the exhaust pulses. They do sound nice- I had one on the LT1-powered Caprice I had- liked it alot-

Sort of a black art to deciding where to put it-

 

Guys,
I am designing a TD setup right now. I am thinking about the H-pipe to get the killer sound.

Please describe the H-pipe. Is it like a simple 6" pipe that goes between the two main pipes? Or something pre-fabbed by a manufacturer?

What are some general rules pertaining to placement on our cars?

 

The ones I've seen are usually very short. Just by looking at an h pipe vs an x pipe, it seems like the h would work better only b/c the x seems like it would cause turbulence with both channels of exhaust slamming into each other in the middle of the x and then having to pick a side to go. I could be totally wrong though...it just looks like that's what would happen. It would be interesting to do a flow test with water through an x pipe and have one side blue water and one side red water. See how much mixing goes on. Do the same test with an h-pipe.

Here's some h pipes for length ref...

I've seen em longer though, but always heard the shorter ones work better.