I am looking at purchasing a Greddy TI-C exhaust here in the next week or so, and my question is not so much with buying that as purchasing as some other things such as the Helix Turbo Outlet, downpipe and test pipe with it. I am a little concerned with emissions testing and I dont want to be insanely loud either. Are all three of these parts a good idea to get with the TI-C. Just looking for some help, thanks in advance.

 

Well you won't pass smog with a test pipe and it'll be louder with it as well. Get a hi-flow cat if you're concerned about emissions and noise but you will sacrifice power. Other than that, an 02 housing and a downpipe should mate up well with a Greddy Ti.

 

You should be good, yeah as soon as you delete the cat your a smogged failed. and as soon as you add the 3in DP/Tp you are def not quiet anymore. I wouldn't worry about it, have fun stay safe. But if you are high flow cat will fix ya up alittle

 

or u can always change back to the stock exhaust to pass the inspection :P

 

AWD cars don't have to run on the emissions dyno, and for OBDII checks, you can either space out the rear O2 sensor or use an O2 sim patch from the guys in the EcuFlash forum.

You'll obviously be much louder than stock.

 

Thanks for the input. Decided to go with everything except the test pipe for now.