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Discussion summary
YOUR RESEARCHTo cat or not to catalytic ??? Please help
Leading reported evidence
Use car as a dd and will do anywhere
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Read evidence and context
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Performed · outcome unconfirmed · Original poster
I use the car as a DD and will do anywhere from 4-7 DE events per year.
Leading evidence: 'Use car as a dd and will do anywhere' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check with porsche dealer' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
If damage you should check with Porsche Dealer for replacements.
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Suggestion · Original poster
I have read that the change in temperature can distort the metal in your exhaust and do not want to have to replace my cats if I decide to go that route.
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Suggestion
You don't say if you are replacing due to damage or modification.
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Suggestion
Unless you run a turbo or highly tuned NA car on the track, it is not for "street use".
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Suggestion · Original poster
I have read that the change in temperature can distort the metal in your exhaust and do not want to have to replace my cats if I decide to go that route.
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13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T194705Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi everyone. I need to order a set of bypass x pipes or sport cats from Fabspeed. I currently have 45K miles on my 996 C4S and this is the first time I am replacing this part of the exhaust. I have BB mufflers and want your guys opinion for my 911.
I live adjacent to Seattle so it rains a lot and I enjoy taking the pig out in the wet. I have read that the change in temperature can distort the metal in your exhaust and do not want to have to replace my cats if I decide to go that route. I may consider ceramic coating the cats to avoid this problem.
If I decide to go with bypass pipes, I will purchase the extender/spacers to aviod the C.E.L. issue and prepare for my neighbors hating me more.
I use the car as a DD and will do anywhere from 4-7 DE events per year. My main goal is to avoid future problems with the reliability of my vehicle but a more open exhaust and half the price of sport cats also is appealing.
All comments and insight appreciated. Thank you.
Don't know about aftermarket exhausts but I've driven through more rain and standing water (and snowy slush) than most in my Boxster and Turbo and the stock exhausts have never had any problems from this.
If you want to avoid future reliability problems with your vehicle in the exhaust area I'd advise you to leave the stock exhaust alone.
You can pay a heavy price for a more open exhaust: More and unpleasant noise (droning/booming). Reliability issues. Impossible to correct error codes due to the substandard aftermarket exhaust O2 sensor positioning and weak converters. Even performance might drop off. These engines are pretty sophisticated air pumps and a change at one end can possibly affect the engine more than making it more noisy.
Sincerely,
Macster.
You don't say if you are replacing due to damage or modification. If damage you should check with Porsche Dealer for replacements.
http://www.epa.gov/oms/consumer/warr95fs.txt
...
A. PERFORMANCE WARRANTY
The Performance Warranty covers repairs which are required during
the first 2 years or 24,000 miles of vehicle use because the vehicle
failed an emission test.
Specified major emission control components
are covered for the first 8 years or 80,000 miles
. If you are a
resident of an area with an Inspection and Maintenance (I/M) program
that meets federal guidelines, you are eligible for this warranty
protection provided that:...
Just my opinion. I see WWWAAAAYYYYY more threads on people trying to get rid of bypass pipes than anything else.
It is a novelty, neat at first. Unless you run a turbo or highly tuned NA car on the track, it is not for "street use".
Go with the high flow cats, and you won't be disappointed, nor will you have any stupid CEL's to deal with.
I loved my Fabspeed cats, but my car is more of a workhorse than a play toy...
I have the 100 cell FVD x-pipe cats with PSE... the sounds is incredible... honestly bypass pipes are WAY too loud... there is no way you can live with those on a daily basis...
loudest is 100 cell; 200 cell are also loud but a little tamer but by no means give you a tame sound...
FVD xpipe cats carry a lifetime warranty and that's why I went with them; for your 2004 you should go with 200 cell cats so you won't get a check engine light...
You really have no concerns with driving in wet weather...I'm not sure why you're so concerned about this. All modern cars are equipped with cats and they drive in all sorts of weather. I agree with the others regarding bypass pipes. On a daily driver it's going to get old very quickly. Not to mentioned I doubt theres a lot of power to be picked up in a NA car with bypass pipes.
-Shawn
you were right!
its sounds amazing I agree... all the guys at the track were coming over telling me how good the car sounded on the front strait away...
don't know what it does for hp but the car seems more responsive and it has better breathing on the top end...
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