Downpipe, High-Flow Cat, O2 Housing

[Batgirl]

I did a search for some information on downpipes and couldn't find anything relating to the cat-back I already have. First a few basic questions, if I get a downpipe, does that automatically eliminate my stock cat or is that only true for some downpipes?

What I would really like to do is find a downpipe that doesn't eliminate the cat (if possible) and also install a high flow cat. Which ones (downpipe and high-flow cats) would you recommend given that I have a Tanabe cat-back?

Oh and I may also want to get an O2 Housing so any favorites there? I looked at the Tuning Guide here (always go there first), but I need to know what your experiences have been with them.

I appreciate all the help and advice I get here!!!!

Thanks,
Annie

 

[DMS-WhiteGSX]

Annie,
I have the Apex N1 3in downpipe, to the Apex 3in dunk exhaust, and I LOVE IT. It eliminates the cat, and is fairly straight back, and @ under 200 bucks its a plus. As for the o2 housing, I'm still running a stock one, but I'm planning on doing an external dump as soon as I get around to ripping my car apart again.

 

[IPT]

I would look into a O2 eliminator DP. I LOVE my DSM Performance O2 Eliminator. I have a test pipe on my car now, so you could put a Cat in there if you wanted to.

 

[Batgirl]

Ok you will probably laugh at me but I would really not like to have an exhaust that wouldn't pass an emissions test (not that they do them here anymore, but anyway). I want to maintain a cat in the system. I have read that any tampering with the cat is illegal, even if you replace it with a high-flow. Is that true?

The deal is I am looking for some mods that would cost around $500 total. See my profile for what I currently have...Thanks a million for your help!

Annie

 

[DMS-WhiteGSX]

I have a gutted cat somewhere.. I've never had a cat on my DSM, so I don't really know about the laws with tampering with a cat. If you don't have emissions I wouldn't really worry about it.. The only problem with my car is that if you ride behind me, its very noxious

 

[Batgirl]

The only problem with my car is that if you ride behind me, its very noxious

Are you sure that smell is coming from your car? J/K

IPT - I will have to check into that O2 eliminator DP. Thanks for the suggestion!

BG

 

[DMS-WhiteGSX]

Originally posted by Batgirl
Are you sure that smell is coming from your car? J/K

IPT - I will have to check into that O2 eliminator DP. Thanks for the suggestion!

BG

I am 115% sure that it isn't my BO, that stays in the cockpit :X

Jk

 

[L2RTSiAWD]

Yes i will also recommend an O2 Eliminator DP that's what I have. I also have a 3inch High-Flow cat since I have to pass emission every year. My cat-back is a ATR 3inch stainless steel. Nice and loud.

Later,

 

[Batgirl]

MuttedTSiAWD - Do you have a downpipe? And what high-flow cat did you choose? Did you have any problems getting the pieces to bolt up to each other? My only concern is that I have a Tanabe cat-back and I don't intend to go Tanabe for any other pieces since the cost is so high.

Thanks!

 

[L2RTSiAWD]

My DP and O2 housing is all one 3inch peice. I used a Catco universal 3inch cat and had flanges welded to it. I had a shop custom fab some extra pipe to get everything to fit. If you buy a High-flow cat specific for our cars you won't need any custom welding but the cat will be 200 bucks. My catco was only 50.

Later,

 

[Turbo Guru]

I have been researching an o2 eliminator and downpipe for my own car and I have come across these two sites. I am considering purchasing from one of these companies after I do some more research and I decide which turbo I will be upgrading to. Check them out, here are the links.

http://rnrracing.com/

http://www.diamondstarmotorsport.com/exhaustparts.htm

Hope this helps,
Joe

 

[L2RTSiAWD]

I bought mine from www.rnrracing.com only 330 for a 3-inch and an excellent peice.

Later,

 

[IPT]

I know that DSM Performance has just made a couple of small changes to their O2 eliminator. The insides are all sanded smooth where there was some weld. I was very impressed when I saw one. I wish I would ahve waited to get mine.. OH well..

 

[RocketDSM]

Yes, for states having smog laws and smog checks, tampering with the catalytic convertor is illegal. Us Cali boys hate it everyday that we start our cars. On a brighter note, they can't tell much except whether it is there or not. A gutted cat can pass smog visual inspection. A high-flow MIGHT. Some do not look stock on the outside and a mechanic can get rather iffy considering it's his job on the line.