only993

I was wondering if anyone has gutted there cat? what performance gains this would add? Would there be any difference between gutting the stock cat vs bypass (Fabspeed/Dach)?

Crimson Nape Racing

from what I have been told, there is no HP gain from removing the cat. the main benefit is less weight and better sound. I would be careful with gutting the cat, I did that in the past and got really bad resonance out of the exhaust.

Felix

On the 993tt the matrix is metal so it really can't be removed without cutting the cat open and removing the insert. The NA cars are probably the same...

TheOtherEric

I'd assume that a gutted cat would still be kinda heavy. But I do know this- you can get bypass pipes for $250 or less used, and they weigh only about 7 lbs. Much better than the 27 lb stock cat. This is the route people typically go.

993inNC

They will sound bad, and that'll just be the begining of your problems
We'd be happy to ship you out a set of bypass pipes if you wish (only993), PM me for details

only993

Does anyone have a used set available? by the way i think the Dach one's are very nice.

993inNC

A guy just contacted me with a set of used X-pipes looking to get new ones because he bought the wrong type. PM me and I'll pass on his email to you. His are bishoff, not sure what you need (what year car do you have?)

Garth S

Are the factory Cats a true X-pipe with bank to bank scavenging? - or is there an isolation plate inside of what looks like a 'X' to keep the banks separate?

polaris 993 sport

i have a euro cat from porsche that is legal in all 50 states-plus i was told puts out an extra 25hp or more-the sound is one of the best with porsche motor sound package-i have been told it is one of the nicest sounding porsche out their-cheers
also it only has 25% restriction