so this is my plan, I have bought 100 cell cats from FVD (circa $600) and will have a specialist TIG welder cut into the OEM cats and replace the originals with these. Am I nuts ? anybody done this and can give guidance ?
Just that on my 996 cab it was the cats rather than the exhaust change which gave the extra performance ?

 

Nope your not nuts, it will gain you some performance and more importantly reduce lag. You are basically making your own RUF exhaust. They exhaust is very similar to stock with racing cats (either 100 or 200 cel can't remeber). The only down sides to not switching to an aftermarket can is you will not save any wieght and you will miss out on some of the power. Turbo cars do gain a good chunk of power out of exhausts unlinke the naturally aspirated cars. Otherwise sounds good to me...I would be interested to hear how it turns out.
Regards,
Evan
BTW-I work for FVD USA, thanks for buying our product

 

Are the 100 cell cats the same length as OEM? I have a Fabiani exhaust with 100 cell cats and the racing cats seem to be longer than the ones built into the mufflers.

 

There are several size of cats. They can be ordered any way you want. Simple depends on the requirements. We have tested these setups and they work well for lower level programs. The system becomes more restrictive the higher the HP level.

 

Exactly
Hey Stephen where are my pictures?? I am dying to see how it looks and I believe Monsour is also as he is going to be running the same setup as you!!
Evan

 

the back presssure on the stock muffler .if u do the cat&the muffler
it would make more sense? if u just do the 100 cell cat what about
muffler. i dont think that would work well. if u do decide to do it
let us know how it work . ~~~i really like to know~~~~~

 

Simple setup as who?? what?? Im confused LOL....

 

So is Theo still around @ FVD? Haven't heard from him here in ages.

 

You brotha, he has the front you are getting and now has the same tail
No, Theo is no longer with FVD USA.
Evan

 

How does removing the stock second cat and leaving the stock first cat compare to using a 100 cell catalyst?

 

There are 2 separate cats in the OEM exhaust ???? anybody got a section picture ?

 

Is this what you're looking for? Snagged it from www.europipe.be




Mike

 

First cat is the one you see - located near engine for quicker warm up for decreased emissions . Second cat is inside the main exhaust. In most cars with two serial cats, the front one is the " pup " cat for cold start emissions and the second one is the " main " cat . Many cars engineered before 2000 had to add a " pup" cat as a quick way to meet LEV emissions regs that started in 2000 , like the Modena, Boxster, Corvette.

 

Care to explain?
Evan