While I am changing out my mufflers, I was thinking about adding a H or X pipe to my exhaust system and was wondering what some of you think about the H & X pipes; which one is the way to go?

BTW the application is for a built 289 w/headers.

 

The X will give you a better air flow. And, that is what you are looking for. However, there is a slight difference in the sound of the two. I have the H on my 65 289 for the deeper sound with my ravin mufflers, but if you are into serious horsepower, the X pipes are definitely your better choice.

 

X-pipe is the better as far as performance (neither H or X give a big change in street vehicles, only a small one). I think ground clearence and room around the transmission are the big issues when using an X pipe because the two exhaust pipes run together at one point.

 

IMO---h pipe sound outweighs the x pipes hp #'s...again, IMO.

 

X pipe is like 7-10Hp more than the H pipe. Go X if you are going to change.

 

The X will give you a MINOR HP + over the H but the H sounds a little deeper. I went with the H on my car because it'll never be raced so the 1-2 HP that the X would give wasn't enough to matter.

Oh, and Glen, don't rear this next statement. . . . . I have the Flowmaster Series 40 with the H and it sounds GREAT!!! LOL

 

7-10Hp more than the H pipe, for a total of approximately what total Hp increase over just headers and dual exhaust?

 

In theory wouldnt seperate dual exhaust be better because there would be no additional back pressure?
Explain why if I am wrong..