924Board.org

[ideola]

Similar to my post about shocks/struts, I know I will eventually need to do a cat back replacement on the exhaust. I've read some posts in this forum that suggest that the Dansk product is superior to Bursch...any other opinions? Given that this will be a daily driver for a 16-yr-old, should I save ~$100 and just go with a stock replacement?

Also, I'd be interested on opinions on what to do with the catalytic converter. It doesn't have any leaks, but the surface has started to oxidize. Should I go to the expense of replacing it? Should I leave it alone? How about knocking out the innards? What about just replacing it with a straight pipe to the cat back exhaust?

I'm not worried about it being legal...in two years the car will be a "classic". We don't have emissions testing anymore in MI, and if they ever reinstated them, it's highly doubtful that this car would be required to pass based on its age.

Opinions, please!

[My924gtc]

First off, where are you at in MI?

Second, I do like Bilstein for shocks and struts. They are stiff yet forgiving and will not make for an uncomforatable ride for the street. Which if you live in SE MI you know how important forgiveness is with our roads. But in your case, Boge would be more reasonable and of course still a very good shock/strut.

If you are looking for any improvement in performance in the exhaust I would bypass the cat with a $60 pipe and go with a Dask system. Borla would be better since they are stainless steel, but price will factor into that decision.

I do have a nice used exhaust system that I could sell you. It is OEM replacement and in real good shape less the chrome tip. You could easily cut the tip off and replace it for around $30. It is the oval style tip and the system is removed from an '82. If you wanted this setup I could throw in the cat too, which is newer also.

Email me if you want to chat about parts.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[ideola]

I'm in Plymouth, grew up in Pontiac. I actually found this car in Waterford, of all things...maybe you know about it? I'll send you an email...

[Benino]

I would feel guilty driving my car without a cat. smog = bad. I would replace the one you have though because I've read that the older a cat is the more restrictive it becomes.
_________________
1980 Porsche 924 N/A USA
1980 Porsche 924 turbo USA
1987 Porsche 944S USA

[augidog]

You can get a high flow cat online for about $80.00
Give your son a nice car and clean air.
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

[Paul]

[Mikri184]

I have used both headers, And honestly, I didn't see much difference. I felt the Bursch was a better quality myself. As far as how it was put together, even though I had to do some rewelding on both. I opened the exhaust up to 2.5" and use a stainless 944 muffler out back with a straight pipe no cat in the middle. I like the sound and the motor does seem to flow better. We don't have emissions here either. And unless you are really going to go through all the emission parts and replace with new just replacing the cat isn't really going to be that effective. And these cars really don't have a high emissions rating either. Porsche was way ahead of it time with that with all the restrictions the U.S. put on them. There are several books that talk about this history of the 924.
So my opion go for the header and don't run a cat. Just don't use a bees in can sounding muffler like all those little japaness cars do. Good luck
_________________
Life is to short to be looking for something?

[Roger]

I bought the Bursch and I was never really happy with it. Especially the twin tip tail pipe. I eventually went to a local muffler shop and had a custom exharaust made. It was expensive but the new system is soild.

As for the cat there is no way that yours is currently working. I would just gut the original and replace it. These cars are relitivley clean to begin with. Assuming that a 20 yeer old cat cant possibly be reducing you emmissions and they still pass emmissions these cars must be fairly low poluters to begin with. Removing the cat is illeagal gutting it is also illeagal but much less obvious.
_________________
1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

[ideola]

Just to clarify, I don't want to get into headers, at least not yet. There is a small exhaust leak immediately after the catalytic converter, so I'm thinking about gutting the cat and replacing everything behind it.

Augidog, where have you seen high-flow cats for $80??? Everything I've seen online is in the range of $300, just for the cat.
_________________
erstwhile owner of just about every 924 variant ever made

[jpab924]

I have a new cat conv. direct bolt on not the universal weld on kind. Also have complete bursch exhaust cat back all the way back to the exhaust tips. All relatively new. Pm me if interested in these items.

[D Hook]

Midas put a generic cat on my '80. I think it was around $129, IIRC.