Exhaust Replacement
Thread Starter
Drifting
Joined: Sep 2001
Posts: 1,875
Likes: 27
From: Long Beach NY
Exhaust Replacement
I also posted this in the General section, might be better here.
I have not been here for a while but I have a question.
I was about to go for a drive today when I notice my right side pipes were lower then the left. I reached under and found the Flange connecting to the Muffler pipe broken off and still attached to the Muffler pipe. I did a search and found that this is common. My car is a '99 FRC with a set of ZO6 mufflers. When I bought the Mufflers I also got the whole set of pipes with the Cats I think they were from a 2002 (there are no pre cats).
I eyeballed the system and it looks as if it will bolt in.
My questions are: The center section removal looks pretty straight forward but will it come out as easy as it looks?
Will this section fit or will I have to remove the old one to find out.
Are there gaskets used on the manifold to engine pipe side?
I guess my GM Extended does not cover this.
Thanks in advance!
Barrier
I have not been here for a while but I have a question.
I was about to go for a drive today when I notice my right side pipes were lower then the left. I reached under and found the Flange connecting to the Muffler pipe broken off and still attached to the Muffler pipe. I did a search and found that this is common. My car is a '99 FRC with a set of ZO6 mufflers. When I bought the Mufflers I also got the whole set of pipes with the Cats I think they were from a 2002 (there are no pre cats).
I eyeballed the system and it looks as if it will bolt in.
My questions are: The center section removal looks pretty straight forward but will it come out as easy as it looks?
Will this section fit or will I have to remove the old one to find out.
Are there gaskets used on the manifold to engine pipe side?
I guess my GM Extended does not cover this.
Thanks in advance!
Barrier
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
I also posted this in the General section, might be better here.
I have not been here for a while but I have a question.
I was about to go for a drive today when I notice my right side pipes were lower then the left. I reached under and found the Flange connecting to the Muffler pipe broken off and still attached to the Muffler pipe. I did a search and found that this is common. My car is a '99 FRC with a set of ZO6 mufflers. When I bought the Mufflers I also got the whole set of pipes with the Cats I think they were from a 2002 (there are no pre cats).
I eyeballed the system and it looks as if it will bolt in.
My questions are: The center section removal looks pretty straight forward but will it come out as easy as it looks?
Will this section fit or will I have to remove the old one to find out.
Are there gaskets used on the manifold to engine pipe side?
I guess my GM Extended does not cover this.
Thanks in advance!
Barrier
I have not been here for a while but I have a question.
I was about to go for a drive today when I notice my right side pipes were lower then the left. I reached under and found the Flange connecting to the Muffler pipe broken off and still attached to the Muffler pipe. I did a search and found that this is common. My car is a '99 FRC with a set of ZO6 mufflers. When I bought the Mufflers I also got the whole set of pipes with the Cats I think they were from a 2002 (there are no pre cats).
I eyeballed the system and it looks as if it will bolt in.
My questions are: The center section removal looks pretty straight forward but will it come out as easy as it looks?
Will this section fit or will I have to remove the old one to find out.
Are there gaskets used on the manifold to engine pipe side?
I guess my GM Extended does not cover this.
Thanks in advance!
Barrier
The front gaskets carry GM part number 12555555 and the rears are 10276792.
HTH
Burning Brakes
Joined: Oct 2004
Posts: 931
Likes: 35
From: Rowlett, Texas
Sorry, that's a BIG NO!
The center h-pipe from a 2000-2004 will NOT fit the '97-'99.
The exhaust manifolds on the earlier cars are a different length, so the front of the H-pipe is a slightly different length.
This assumes you don't have headers of course.
You might do a search of some of my earlier posts on this for all the morbid details.
Sorry,
DG
The center h-pipe from a 2000-2004 will NOT fit the '97-'99.
The exhaust manifolds on the earlier cars are a different length, so the front of the H-pipe is a slightly different length.
This assumes you don't have headers of course.
You might do a search of some of my earlier posts on this for all the morbid details.
Sorry,
DG
Thread Starter
Drifting
Joined: Sep 2001
Posts: 1,875
Likes: 27
From: Long Beach NY
Thanks for the reply Wrench. Are you positive about this?
Would removing and welding up the old Flange work? Are there any special welding skills needed? Any idea of cost if I remove the pipe and bring it in?
Barrier
Would removing and welding up the old Flange work? Are there any special welding skills needed? Any idea of cost if I remove the pipe and bring it in?
Barrier
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
The gasket part numbers still apply though. As far as welding the broken flange goes, that's what I did to mine when that happened. A welder shouldn't charge more that $10 or so if you brought it to him.
Burning Brakes
Joined: Oct 2004
Posts: 931
Likes: 35
From: Rowlett, Texas
Yeah, trust me on this; I did a lot of research when considering upgraded exhaust on mine.
You can check some of my old posts for lots of gory details about the C5 exhaust interchangeability.
As to cut and weld; yeah, should be doable. The '00-04 midpipe is actually a bit longer than the '99 (to accomodate the Pup cats used on the '00-'04 LS1 cars), so you could "probably" cut the pipe, take a bit out, and reweld. However, there is no real advantage in the Z pipes.
Both the z and the '99 have only 2 large cats, and the Z actually has 2 separate "bricks" inside, where the '99 has only one brick; so the '99 might actually flow slightly better!!
In 2002, they bragged about the less-restrictive cats on the Z, but that was in comparison with the '01-'04 cat system, not the old 2-cat system like your '99. If it were mine, I would justweld up the current pipe and sell the Z pipe on the Forum. I haven't heard herein of anyone cutting/welding to match these components, might be a downpipe-flange-angle issue to contend when trying to weld them back up.
DG
You can check some of my old posts for lots of gory details about the C5 exhaust interchangeability.
As to cut and weld; yeah, should be doable. The '00-04 midpipe is actually a bit longer than the '99 (to accomodate the Pup cats used on the '00-'04 LS1 cars), so you could "probably" cut the pipe, take a bit out, and reweld. However, there is no real advantage in the Z pipes.
Both the z and the '99 have only 2 large cats, and the Z actually has 2 separate "bricks" inside, where the '99 has only one brick; so the '99 might actually flow slightly better!!
In 2002, they bragged about the less-restrictive cats on the Z, but that was in comparison with the '01-'04 cat system, not the old 2-cat system like your '99. If it were mine, I would justweld up the current pipe and sell the Z pipe on the Forum. I haven't heard herein of anyone cutting/welding to match these components, might be a downpipe-flange-angle issue to contend when trying to weld them back up.
DG
Thread Starter
Drifting
Joined: Sep 2001
Posts: 1,875
Likes: 27
From: Long Beach NY
Well Wrench you were 100% on this. I removed the pipes today and my '02s didn't match. I had the old one welded, the broken off one, as well as the other side which started to crack. I'm going to install them on Thursday. Biggest problem was pulling the O2 sensor connections since I was only using Ramps I worked by feel and mirrors. I had a set of Tilt Ramps but sold them last year since I never really used them DUH!
Thanks for the Help from everyone on this.
Barrier
Thanks for the Help from everyone on this.
Barrier
Last edited by Barrier; May 28, 2008 at 09:52 PM.
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