I am confused :confused:
My stock exhaust system (except for the Z06 Exhaust after the flange) has a pipe connecting each side to one another just after the cats ('H' Pipe). Whate is the difference between that and an 'X' Pipe?? Your help would be appreciated!



[Modified by l2vette, 12:37 PM 8/29/2001]

 

Just had the X-pipe installed last week along with the A&A exhaust modification. Just kind of did it because everyone else seems to, but sure do like the way it sounds now. As far as the factory H-pipe, what a joke! It has a 2 1/2 inch pipe welded in place but there was only a 3/8 hole drilled into my exhaust system.

 

The stock pipe is only for support! The Corsa "X" pipe gave me 3HP and 7lbs of torque!
Plus the exhaust sounds deeper. It's a nice mod if you've already done everything else!
Tim

 

WOW only a 3/8" Hole and its only used for support?

 

The x-pipe is to equalize the gasses as they flow through the exhaust the H-pipe is purely for support.I picked up about 9 H.P and 7 lbs.TQ.

See pics of my NO cat exhaust install with x-pipe and h-pipe on my home page.

 

I shoulda known it was a phony "H" pipe. My old C4 had dual exhaust pipes coming out of each muffler, but one was a dummy, welded on but no hole into the muffler chamber. Maybe the same engineer designed both.

 

X-pipe flows better... The H-pipe from the factory was different on different years.... the 97 and some 00 models have a large H-pipe...same diameter as exhaust... the 98/99 and some 00 have a smaller one. So if you already have the bigger one.. and Xpipe is not that much different, but if you have a small one, its a good mod.

 

ncvetteman, do you know what size the H pipe is on the 01s?

 

Corsa's website has the best information I've read concerning the factory H-Pipe, so I'll quote it here. The info. I'm posting here is non-biased to a particular X-Pipe manufacturer. (This is taken from http://www.corsaperf.com/crossover.htm)

 

I added the X-pipe and it gave the car a much deeper sound. :cheers:

 

Don't remeber... If you look under your car, you can see if its the same size as the other exhaust pipes, or smaller. Its the small pipe that goes between them near the back of the doors. Hope that helps

 

97 and 01 inside opening on the factory h-pipe appraches 2". The 98,99 and 00 are only about 1/2" at best.

A x-pipe added to an aftermarket exhaust on 98/99/00 will smooth your idle to more of a fan than a pump, knock off about 10% of your WOT sound and reduce the popping and gurgling on decel. You will also pick up a few ponies.

On the 97's an '01s it seems to have less of an effect on sound because of the larger opening the stock piece has to start with.

If you get a chance to listen to them back to back, that is, a x-pipe car and a non x-pipe car with the same exhaust, you will see what mean.

The difference on the x-pipes is price, based on materials and length. Welding on the smaller ones (15" x-pipe) is a must. The Corsa Stainless Steel X-pipe requires cutting, but, no welding.

I have the smaller one on my 2000 with Indys and love the sound. Just right for me.

RG

Corsa:



Aluminized pipe:






[Modified by RG in Dallas, 4:32 PM 8/29/2001]

 

ncvetteman and RG, thanks for your response. Sounds like (no pun intended) the x-pipe would have less of a performance impact w/ the '01 than previous years.

RG, you are on the money regarding comparing sound. At Bloomington Gold, a vendor had two vettes both w/ corsa indy exhaust, but one also had the x-pipe. Very distinct difference in sound - one not necessarily better or worse than the other, just very different.

 

Agreed. The best way to discern is to actaully hear them. As many car shows that occur this time of year, one should be able to get a stable full of sounds out there before buying.

I would still go x-pipe if I had a '01, because I like it better. Doesn't mean the next guy will, but, I do. If I want it a little louder and thicker, I'd add headers. If I added head and cam to a car, along with headers, I'd go Route 66 from B&B..MATTG on the Forum here went that route(no pun intened, but, I'll take it), it sounds deep and bassy, without a 'scalding' sound. X-pipe would be in there for sure no matter, for me.

When MATTG didn't have head/cam, he had Corsas on his '97. They sound different than mine. We met in Carlisle last year and I rode with him most of the time and noticed the sound was a little different. I thouhgt he HAD an x-pipe, but he didn't. We knew the h-pipe holes were different inside and the light went on to both of us, about the reason for the differences in his sound versus my 2000, with the same Corsa Indys.

Good sound, even GREAT sound is certainly in the eye of the beholder. Just like Music.

RG

 

I think it was Hot Rod mag. that did a back to back comparison with a factory exhaust, H-Pipe, X-Pipe, and Open headers. The factory was the worst, the H wasn't much better, The X put the most torque to the ground, and open headers had the most peak HP by 1 or 2 hp(I think it was w/out cats). This wasn't on a Corvette but exhaust is still exhaust. The way I understand it works is that the gases flowing out of one tube causes a vacume in the other tube at the same time the exhaust valve opens (the same idea as headers). This would then suck the gas out of the chamber. Well who cares how it works it does tests show it. :chevy

Jerry

 

RG,

I have a catback Borla system with a resonator about where the x pipe would be. Does this mean that I would have to special fabricate a crossover, or can I use the small x pipe?

Herb

 

4DCYKEY,

In the interest of not misinforming you with a guess, I would need a pic. I could give you a better answer to your question that way. The aluminized one is right about 15" long.


RG

 

00 model year had a few changes.. after the second third of production, I believe 01 exhaust was included, along with passenger air bag cut off switch. just my .02.
:D

 

some people are getting confused with the x-pipes.i installed the x-pipe that replaces the void where i removed all 4 cats.there are other x-pipes that replace the h-pipe section.i also replaced the factory section after the h-pipe,with corsa indys and pro tips. :crazy:

 

Just picture water flowing through each brand of X-pipe. Pick the one that flow more water, thus more air. The stock system (H Pipe) with it's 90 degree H Pipe design and smaller holes, vs. Bazzini X Pipe and it's huge X-Pipe plenum, vs. Corsa's X-Pipe of sorts (two tubes mated together), and you will no doubt see that the Bazzini X-pipe would flow the most water with the least amount of resistance.

I had Corsa Indy and stock X-Pipe and loved the sound. Then I added the Bazzini X-Pipe and it quieted and deepened the sound a fair bit. It was evident that the Bazzini X-Pipe was doing what it was supposed to flow undisturbed air. I can't say how good the Corsa X Pipe is, but I am sure it nearly as good as Bazzini. Corsa might flow a hair less, BUT that might give the car a few more FT lbs of Trq. as some time a bit of back pressure is known to do. I did not dyno both.

I would be interested in any one who took the time to do dyno Stock H Pipe Vs. Bazzini X-Pipe Vs. Corsa's X-Pipe. (Anyone do that?)

I doubt anyone would waste money installing both and dyno'ing both but if anyone has as tests that would be very interesting to see the results.

Thanks everyone for sharing info, I like this CorvetteForum very much, Many Thanks to a few special one C4C5 Tech, All info always appreciated. :seeya :chevy :spam