Originally Posted by Silver on Blacks
I was wondering what downpipe will create more power and what is better for the car.
I am looking for the turbo spooling noise and I heard you cant get that sound when you have a catted DP. Is this true?
I also dont want CEL and I have to pass emissions since Im in california.
If I did go with a catted DP can I go catless the rest of the way back and be fine with no CEL or boost creep and still pass smog?
Im not sure what company I want to go with but I want a good sounding downpipe and a good sounding catback thats not a big mellon shooter. Any suggestions?
Is there anyway I can get an aftermarket DP, keep the stock midpipe with resinator in it and have a catback bolt to that??
A lot of DPs will help you get more power, there is not 1 specific brand that does. There is a lot of info on personal opinions/impressions on DPs/UPs/etc. here on the board. You really should do a search on downpipes and read thru the 10,000,000 hits you'll get. I think there is also a DP FAQ here on the board you can look over for a more unbiased viewpoint. And check the Vendors Forum for DP suppliers. Daddy's is a good one but opinions vary.
You will hear more noise w/no cat in the downpipe than w/a cat in the downpipe.
You pull all those cats and you will almost definately fail emissions. Some on the board have removed all of them and have passed. You may fail a visual check, but failing a visual check is not failing emissions. But, in either case, emissions or visual, you have failed.
Yes, you can get an aftermarket DP, keep the stock midpipe and resonator and get an aftermarket axleback
, not a catback. A catback means from the cat back, which would replace the stock midpipe and resonator.