Exhaust system

[roccodelutiis]

Hi, I have a 95 Porsche 993 n/a and is completely original, I would like to upgrade the exhaust system. Which is the most recommended based on yours experience.

Thanks.

[Joe Bob]

It's a pretty good system as-is. Mods will make you fail smog....if you have inspections where you live. Might want to put your location.

A performance chip and a cat replacment would help and easily reversible. A higher flow muffler wouldn't hurt.....

[bri450sl]

Check the rennlist 993 forum. Lots of upgraded exhaust posts there.

[michaelh993]

Fister Stage III
AWESOME!!!!!!!!!!

[craig001]

There is a Fister Stage II on eBay right now.

[Kraftday]

I've experienced, installed and sold just about all of them for the past 10 years. One ultimate brand and which I consider the cream of the crop is Europipe in Belgium (check these guys out and you will benchmark what I mean). One upping the engineering and production quality of Gillet and Bischoff hasn't been commonly achieved in my opinion.

I'd have to recommend Dansk. They feature the larger 60mm tubing (throughout), 304 stainless steel and mounting tabs for attaching the original equipment heat shields. These are slightly deeper tone both at idle and progressively louder at higher RPMs. No drone and good for cruising while talking on the mobile phone. Frees up about 5 hp and Tq. Most of the power a weight advantages are achieved by replacing the catalytic converters with a 100-200 cpsi metal cores. Replacing the cats also allow for more aggressive sound output. Dansk also has this set available. And tips if you care for them.

Note on 96- models: If you renew your cats with the 100cpsi versions, the CEL will follow due to "catalytic converter efficiency below threshold". This can be corrected with reprogramming the ECU.

Im selling this 97 993 with this exact complete system..Dansk Sport mufflers / Metal Cats The car rips and demands attention when you floor it.

There is a movie with cold start demo and a few photos here:
http://forums.pelicanparts.com/porsche-cars-sale/615807-993-carrera-sale-arizona-usa.html

Hope this helps you decide chief!

[Kraftday]

Dude, your in luck..

Fellow pelican..
http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/534121-fs-993-dansk-sport-mufflers.html

The 95-97 (Non-Turbo) all the same mufflers and fitments. Wide bodies however require and offset for the tips.

[Schwarzeritter]

It really depends on what you are attempting to achieve, and the area of performance emphasized.

A number of factors come into play and it depends on if the system was designed to operate ( with in the factory management systems ability to control the new values. ) And if the system infact was developed around the factory engine-management then you will not have an emissions issue.

lol, however most firms don't do this because the cost of research and developement and formulas and time etc. This is why most vehicles German, Italian, Japanese, alian space craft require some adjustments to management to make a few corrections.

Other things to think about, how power is developed. Power developed at peak rpm's are ok, but not always desirible for a road car vs race car. For a road car having 5-15 extra hp in the low to mid range is more useful, so long as you are not losing pre peak existing power.
The materials being used are just as important and also contribute to how the sound of a system as well. Beyond this, it also effects the durability too.

In terms of cost most firms and customers are very willing to go with a lower grade alloys.
Such as 302 or 304 which are nice for mass production items ie that in which is not exclusive but does the job with ( a decent control on quality. ) If you have money, and a firm that has the tooling and experince, 309 or Titanium or Inconel. Generally speaking Titanium has a more metalic ring / tone, 309 / Inconcel organic tone.

Thou, usually Titanium systems are used for maximum weight. 309 is near-ish to Inconel however Inconel is well super-wonder alloy and a real son of a ( SELECT A LOT OF CLEVER VULGAR WORDS HERE ) yeah. Normally with the inconel we can use simply less material which results in weight savings with durability.

Where as the 309 can't quite go as extreme. Titanium requires a well thought out design, to little material and or the wrong grade or processing or bad batch etc and it can crack. But now were getting into a whole heck of a lot of other potato chips and so on.

Last but not least, I always recommend a high quality Cat's. Just depends on what you have and if you are just replacing the muffler itself or complete system. Have fun thou! Good luck and I hope you find something that fancys you.

[Bill Verburg]

Originally Posted by roccodelutiis

Hi, I have a 95 Porsche 993 n/a and is completely original, I would like to upgrade the exhaust system. Which is the most recommended based on yours experience.

Thanks.

As has been pointed out it depends

On my '95 I have several different exhaust configurations all currently use stock 993 headers. At one time I used 1 3/4" B7B headers w/ a Flowmaster muffler, too loud and negligible performance gain

quite setup, LRP legal and best to my ear for all around street use
Fabsped cat bypass, into stock turbo mufflers

much louder, not relly enjoyable either
Fabspeed cat by pass into RSR modified mufflers

Lots of guys seem to like the FD modified muffflers too.

If you need to retain cats I can't off much help

[gbooth]

Those I put on my '96 came highly recommended, and are a modificaition of the original Porsche mufflers. Some people like that when they enter their cars in concours events as it allows them to pass for "stock" Porsche.

Keep in mind that the type sound can be an issue if you use your Porsche for long trips. Too much raspiness or droning can really get on your nerves.

Here's the full story RSR Muffler for 993

Gary.

[Kraftday]

Complete Danks Exhaust system with about 7K miles. This set is 100% stainless steel, sounds great without drone (even in cabrio) and costs about $3100 new. Key is that the tubes are 60mm throughout! Replacement of both mufflers and cats will save much weight. Getting a new set means you can convert back to original if you wanted too. Replacement of heat exchangers is costly and not worth doing on a street car IME.



YouTube cold start demo