Who makes Cat delete pipes?
Thread Starter
Burning Brakes
Joined: Feb 2013
Posts: 844
Likes: 55
Who makes Cat delete pipes?
Who makes Cat delete pipes that bolt up to the factory OEM exhaust manifolds?
I have a track only car running stock exhaust manifolds but looking to remove both front and rear cats.
Looks like it would be pretty easy to unbolt the connection at the exhaust manifold, make a cut right after the rear most cats and then bolt/clamp in a plain pipe if someone makes it.
I have a track only car running stock exhaust manifolds but looking to remove both front and rear cats.
Looks like it would be pretty easy to unbolt the connection at the exhaust manifold, make a cut right after the rear most cats and then bolt/clamp in a plain pipe if someone makes it.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Is the car licensed? If not, you might ask a local muffler shop to cut out the cats and weld in open pipes. You may have to trailer the car to a shop and let them know the car is used for "off-road use only".
Many shops won't remove working cats. If they would get caught, they could face a 5-figure fine.
Just have to find a small shop that would do the work.
Many shops won't remove working cats. If they would get caught, they could face a 5-figure fine.
Just have to find a small shop that would do the work.
Pro
Joined: Jan 2017
Posts: 545
Likes: 86
If you take the pipes off the car and to a muffler shop they will usually cut them out and install straight pipes. My fabricator did mine and had no issues as long as he wasn't putting it back on the car.
Last edited by SocalC5Z; Sep 6, 2017 at 10:14 AM.
Thread Starter
Burning Brakes
Joined: Feb 2013
Posts: 844
Likes: 55
I don't have a picture of the bottom of my car but there are 2 bulges in the pipe just after the stock exhaust manifold nut/bolt flange.
1st(front) bulge is pretty small so I'm not sure if it is a cat, 2nd(rear) bulge looks like the cutout piece in the above pic from Dunlevys.
So I'm not sure if that is 1 or 2 sets of cats?
1st(front) bulge is pretty small so I'm not sure if it is a cat, 2nd(rear) bulge looks like the cutout piece in the above pic from Dunlevys.
So I'm not sure if that is 1 or 2 sets of cats?
Last edited by dapopa9; Sep 6, 2017 at 07:00 PM.
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Safety Car
Joined: Feb 2013
Posts: 4,346
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From: Greensboro Nc
Not that it really matters, probably what happened is the previous owner either had bad cats and bought a used 01 h pipe or he had headers and when he went back to stock put on used 01 parts.
Pro
Joined: Jan 2017
Posts: 545
Likes: 86
Yeah you have what they call "pup" cats and like dbgoodwin posted, 2002 and later C5's usually didn't have them. Who knows what a PO may have done in the past. Maybe find a later exhaust like mine or you could punch out the pup catalyst substrate (PITA) and have the straight pipe mod done on the main cats. Doesn't make sense to pay a fab guy or muffler shop to do four straight pipes on this exhaust.
My fabricator welded a brace on the pipes after he cut the cats out one at a time to keep the pipes aligned while he welded in the straight pipe. That is the only correct way to do it off the car if you want it to align properly.
My fabricator welded a brace on the pipes after he cut the cats out one at a time to keep the pipes aligned while he welded in the straight pipe. That is the only correct way to do it off the car if you want it to align properly.
Pro
Joined: Jan 2017
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Likes: 86
Burning Brakes
Joined: Oct 2004
Posts: 931
Likes: 35
From: Rowlett, Texas
I had a Bassini cat-delete pipe way back when. Had an x-pipe half way back and was a simple bolt-on to the rear muffler pipe flanges. Smelled so bad and backfired a lot; sold it years ago.
All the non-Z06 cars from '01 - '04 had the pup cats shown in the photo above. As mentioned, he probable took headers off and found a cheap replacement from a non-Z06. Less than 5 HP loss on the pups - but then cheap HP is hard to find!
DG
All the non-Z06 cars from '01 - '04 had the pup cats shown in the photo above. As mentioned, he probable took headers off and found a cheap replacement from a non-Z06. Less than 5 HP loss on the pups - but then cheap HP is hard to find!
DG
