Stupid question here....
Race Director
Joined: Feb 2004
Posts: 11,651
Likes: 9
From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Not a stupid Q -
While I was at Andy's shop, I asked him the same question and he told me, on a stock exhaust, there's little to no effect. The X is supposed to reduce cabin resonance on the louder exhaust systems.
I still have my stock exhaust, so unless there is a benefit worth changing to an X, I'll keep my H.
While I was at Andy's shop, I asked him the same question and he told me, on a stock exhaust, there's little to no effect. The X is supposed to reduce cabin resonance on the louder exhaust systems.
I still have my stock exhaust, so unless there is a benefit worth changing to an X, I'll keep my H.
Safety Car
Joined: Jul 2002
Posts: 3,874
Likes: 0
From: Fishing Somewhere Cold
St. Jude Donor '11-'12-'13, '15
an X pipe smooths out the exhaust "pulses" and delivers smoother flow resulting in less resonance...the crossover opening is much larger than the stock H pipe which on mine was no bigger around than a nickle!!
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
The H-pipe has been designed into most factory duel exhaust systems to balance the left bank right bank exhaust pulse scaveging.,.. and equalizes back pressure. The H pipe design is a poor flow manager, but it's a cheap manufacturing application.. The X pipe on the other hand does a much more effecient job of balancing the exhaust pulses and will give better scavenging and reduce decell popping.. and add some ponies...because of better exhaust exit.
Drifting
Joined: Jun 2004
Posts: 1,887
Likes: 2
From: Havin' fun in Frederick, MD!!!
St. Jude Donor '05 '09
Let's expand the questioning a bit...
I have a Borla Cat-back (Stinger w/duals) and kept the OEM H-pipe. I don't mind the popping, in fact I kind of like it, but I have been told by a "certified" GM Tech that it causes damage to the exhaust valves. Given that it may add some power, I'm now questioning swapping the H for an X. Is the H-pipe bolted in at both ends (I know that it is bolted aft because I bolted my Borlas to it, but is it also bolted at the forward end? Or is it welded in? (It's easier to ask you guys than to jack up the car and crawl under it.)
I have a Borla Cat-back (Stinger w/duals) and kept the OEM H-pipe. I don't mind the popping, in fact I kind of like it, but I have been told by a "certified" GM Tech that it causes damage to the exhaust valves. Given that it may add some power, I'm now questioning swapping the H for an X. Is the H-pipe bolted in at both ends (I know that it is bolted aft because I bolted my Borlas to it, but is it also bolted at the forward end? Or is it welded in? (It's easier to ask you guys than to jack up the car and crawl under it.)
Le Mans Master
Joined: Oct 2002
Posts: 6,772
Likes: 1
From: Tampa FL
Originally Posted by lemansbleu2004
Let's expand the questioning a bit...
I have a Borla Cat-back (Stinger w/duals) and kept the OEM H-pipe. I don't mind the popping, in fact I kind of like it, but I have been told by a "certified" GM Tech that it causes damage to the exhaust valves. Given that it may add some power, I'm now questioning swapping the H for an X. Is the H-pipe bolted in at both ends (I know that it is bolted aft because I bolted my Borlas to it, but is it also bolted at the forward end? Or is it welded in? (It's easier to ask you guys than to jack up the car and crawl under it.)
I have a Borla Cat-back (Stinger w/duals) and kept the OEM H-pipe. I don't mind the popping, in fact I kind of like it, but I have been told by a "certified" GM Tech that it causes damage to the exhaust valves. Given that it may add some power, I'm now questioning swapping the H for an X. Is the H-pipe bolted in at both ends (I know that it is bolted aft because I bolted my Borlas to it, but is it also bolted at the forward end? Or is it welded in? (It's easier to ask you guys than to jack up the car and crawl under it.)
?i think that's what you were asking.
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Race Director
Joined: Oct 2002
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From: Vancouver
2015 C5 of Year Finalist
St. Jude Donor '05-'06-'07-'08-'09-'10
Originally Posted by Neablas
no stupid questions here. 
Everyone learns here every day. Good question there were some answers I haven't heard of. 
Instructor
Joined: Jul 2004
Posts: 207
Likes: 0
From: Waldorf Maryland
H-pipe bolted
I put on the Bassini X-pipe with the Borla after cat exhaust and the H-pipe is bolted in, while the pipe was disconnected i installed the heatmaxx shield in the tunnel, and that was worth every penny as the console was a lot cooler 
and then bolted in the X-pipe. 
and then bolted in the X-pipe.
