im sure everyone next to me does too 
cats/header question
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Teching In
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cats/header question i have a 2002 ws6 a4 basically stock- lid, 160 thermostat, corsa exhaust, k&n filter. im looking at putting headers on my car. one performance shop told me that i should get a y pipe with cats on it bc if i dont have cats it will smell like rotten eggs whenever i stop and that it doesnt make that much of a difference powerwise. so i was wondering who has cats or if i should just forget them and get an ory? (it's my daily driver)
Also, does anyone have the stainless steel hooker headers on their car? I was wondering if i should get those or if its worth it to spend more and get qtp or kooks?
thanks so much!! sorry for writing a book
Also, does anyone have the stainless steel hooker headers on their car? I was wondering if i should get those or if its worth it to spend more and get qtp or kooks?
thanks so much!! sorry for writing a book
I run with no cats and I have never smelled rotten eggs, just a real strong gas smell sometimes. If you run no cats you will pick up some rasp depending on the wye pipe you go with.
Last edited by tasilver; Jun 13, 2007 at 08:54 PM.
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From: North Bay, Ontario
To be honest an ory doesnt smell that bad at all...it definatley has a smell but nothing crazy...i would personally run cats with the Y because it will get rid of a lot of rasp and make the exhaust note sound better IMO, and also the cats create a bit more backpressure which allow for a little more torque down low...
I agree with wats been said!!! having no cats will make a stronger smell but nothing like rotten eggs!!! it all depends on whether or not you can handdle the smell of gas!!!! i personaly have cats!! I live in california and the traffic is a bitch on the freeway and not having cats would make my eyes red every single day!! its up too you!
i run 18" bullets off my headers, no y or x just dumps so there is alot of exhaust coming into my car and it doesnt smell bad at all... in stop and go traffic it just smells like a race track. go for catless. it will sound alot better anyway
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I ended up getting a catted Ypipe with my corsa & LT headers. Its going to be extremely quiet with the cats BUT it keeps the sound so clean!...corsa alone is quiet unless at WOT. So I added an electric cutout to my system and i get compliments all the time about how good it sounds. I like the smell of gas so i wish i would have gone ORY sometimes but overall im very satisfied with everything
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Thread Starter
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Originally Posted by ohsofast
I have catted Y with my LT and corsa setup on my stalled A4 and love it. People are always suprised when I tell them I have cats.
which LTs/cats/Y pipe do u have? how did they fit with the corsa? did you have to cut part of the catback?
thanks!!