Originally Posted by arewmors
^ pretty sure odds of boost creep go up with a non catted dp. Catted is the best bet. I typically don't stand behind my car and smell the fumes so that shouldn't matter. I'd rather have "safer" performance. You may lose a whole 5 hp from a catted dp.
You are absolutely right Andy! Although creep is not guaranteed to happen the odds are higher catless like you said and if it does happen (which nobody will ever know until the parts are already installed) catted is the best bet and cheapest in the long run.
Originally Posted by synolimit
More money, they fail, smell worse, less power, no thanks.
You are also absolutely right...kinda.
Catless is cheaper considering you don't get creep/spikes.
Cats can clog up or even break apart over time.
I'm not so sure they smell worse. They are supposed to remove or lessen some of the bad emmisions so, I would think catless would stink more.
A few extra ponies is to be gained without cats but like Andy said, they are minimal.
There is nothing wrong with using a catless downpipe. Just be sure before you commit that you will be ready for the extra cost you may incur. It is possible you could need wastegate porting, extra tuning, external wastegate, and/or a different boost control solenoid to combat overboosting. You should also think about inspection if you have them. then again you may slap it on and everything be easy-peasy. I went catless and overboosted. I ended up having to get a ewg, ebcs, and tuning to fix it. I love it but, a catted would have saved me some much needed cash at the time.