"H" or "X" Exhaust ?

[anlauto]

Other then the obvious, what's the difference between "H" pipe exhaust and "X" pipe exhaust....
Which preforms better and why ?

I'm looking at TTI's 3" systems

[cudabob496]

Other then the obvious, what's the difference between "H" pipe exhaust and "X" pipe exhaust....
Which preforms better and why ?

I'm looking at TTI's 3" systems

X Pipe for sure. Better exhaust scavenging (the more bad air you get out, the more good you get in) (may also reduce backpressure, but not sure). About a 15 - 20 horse diff on my Cuda, ad TTI said it would. Have a TTI X-pipe system. Use to have a TTI H pipe system.  Could feel the diff when I switched.

[johns cuda shop]

Other then the obvious, what's the difference between "H" pipe exhaust and "X" pipe exhaust....
Which preforms better and why ?

I'm looking at TTI's 3" systems

Alan, regardless on what you might hear here. There is alot of opinions out there on this subject. The jury hasn't decided on either X or H pipe gives you any more performance or not. If someone does a test with both exhaust systems on a Dyno then we will know.I have done both, my experience is there is not any difference .  One thing I will say the X is a real pain if you ever want to lower the car or remove the trans.

[cudabob496]

TTI had done the testing. My butt dyno agrees with their results.
Very easy to install, and remove, whenever you need to.  I just clamped it
right in.

Here's another test:

http://www.allpar.com/history/mopar/x-pipes.html

And Magnaflow says significant power increase over H-pipe:

http://www.magnaflow.com/02product/02xypipes.asp

[cudabob496]

Here's another test:

http://www.moparmusclemagazine.com/techarticles/engine/mopp_0301_dodge_challenger_x_pipe_exhaust/viewall.html

[johns cuda shop]

 Yeah I have seen those tests too. Too bad TTI didn't do any of the tests. I know magazines need to keep people interested publications and keep their advertisers happy (I want to see the dyno slip) not the printed results in a magazine.There are alot hype out there. I am not sicking up for either one..Just a fact. What would be great would a member here did the test..With the same car being equal switch the pipes on the dyno My car is a year out from running right now , I have to dyno my car to map out the PCM .Maybe If no one steps up ,maybe I can do it then. But like I said its no big difference that I can feel, certainly not the 20 HP + that those articles claim...

[Topcat]

   One thing I will say the X is a real pain if you ever want to lower the car or remove the trans.

That's why I decided H over X.

I knew it could become a pain later on.

[73restomod]

H pipe vs. X pipe... Normally the x pipe is better, but there are exceptions to the rule. Heartthrob exhaust found more HP and 40 more ft lbs. With an H pipe on the new 5.0l stangs. Personally, I feel the exhaust systems layout is what may cause these kind of anomalies.

[Chryco Psycho]

H is more original & will allow the pressure to balance out through both mufflers , I have typically used this for restos
X seems to have a slight edge in power & I can see it creating some turbulence where the pipes cross , I typically use this in performance builds .
  both can be a pain with trans removal depending how far back the H or X is situated & they both effectively double the size of pipe available behind the head pipes or headers

[cudabob496]

H is more original & will allow the pressure to balance out through both mufflers , I have typically used this for restos
X seems to have a slight edge in power & I can see it creating some turbulence where the pipes cross , I typically use this in performance builds .
  both can be a pain with trans removal depending how far back the H or X is situated & they both effectively double the size of pipe available behind the head pipes or headers

The TTI 3 inch X-pipe I have seems to be an excellent design, as far as minimizing turbulence, and maximizing exhaust flow, just from the looks of it.

[dodj]

No expert here, but when I was looking into what new exhaust system to buy, X seem to have the upper hand by a small margin. But the two systems are different in where it benefits the most. Can't remember which is which but one is better at higher RPM, and the other is better at lower RPM.

[anlauto]

Thanks guys...I think I'll go with the "X" design because it looks cooler...

[burdar]

There is also a sound difference.  Some don't like the sound of the X. 

[mopar jack]

I think TTI recomends that the X pipe should have a little tack weld to hold it in place. That would make it a little more difficult to remove. However even the H pipe takes a little effort to seperate after the clamps have been tightened a couple of times.

Jack

[cudabob496]

There is also a sound difference.  Some don't like the sound of the X.

Made my Cuda a tad mellower. To me, that's a sign of exhaust efficiency.  But I still need earplugs.