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View Full Version : emission's time....CRAP!!!


exiletalon
07-19-2006, 11:33 PM
ok, I have a 3" turbo back,- no cat, no resonator, very illegal. well- I have the evo3 o2 housing ( ported- if it matters), however. I am asking what to do for emissions.
several have told me different opinions.
1-( what I am leaning toward)- is to buy a complete- stock 2g AWD exhaust.
-however, I am not sure if it bolt onto the evo3 o2 housing.
2-appropriatly cut the exhaust, and weld in a high flow cat.

I would be looking at around the same price for both options but what would be prefered or work best?
thanks you guys-
buckley
07-19-2006, 11:40 PM
In my opinion, I would cut the exhaust and create two flanges so that you can switch out a regular cat with a test pipe...

Adrian
exiletalon
07-19-2006, 11:50 PM
will that pass emissions?
exiletalon
07-19-2006, 11:51 PM
so "bolt" in a stock cat. and not use the high flow cat?
and weld flanges onto the peice we cut out- to replace after test?
sbiggi
07-20-2006, 07:02 AM
High flow cat will do just fine for emmisions. Buy one and 4 flanges so you can make a test pipe at the same time.

Make sure your fuel trims are all close to 100%, if they are not then you need to do some tuning.
With the fuel trims all close to 100% and a cat, you should pass easily.


If you get the parts, we can weld up flanges and whatnot for you and get the cat and test pipe made.
exiletalon
07-20-2006, 01:36 PM
you say - " you can weld it up for me?"- does that mean that I could just meet up with you and we can work on my exhaust?
sbiggi
07-20-2006, 03:12 PM
you say - " you can weld it up for me?"- does that mean that I could just meet up with you and we can work on my exhaust?

My brother and roommate can both weld, and we have a migwelder at our house in Castle Rock.
Hal
07-20-2006, 08:37 PM
Two words...

slip joint
sbiggi
07-20-2006, 09:00 PM
Two words...

slip joint

Slip joint and weld it. It the only way to do a exhaust properly.

Butt welds are weak.
Kurb_Appeal
07-20-2006, 09:39 PM
High flow cat will do just fine for emmisions. Buy one and 4 flanges so you can make a test pipe at the same time.

Make sure your fuel trims are all close to 100%, if they are not then you need to do some tuning.
With the fuel trims all close to 100% and a cat, you should pass easily.


If you get the parts, we can weld up flanges and whatnot for you and get the cat and test pipe made.



If you go this route I would recommend getting 6 flanges.
(2) for the exhaust
(4) for the test pipe and cat,(2 for each)

Otherwise you have to figure out how to bolt them all up :D
sbiggi
07-21-2006, 05:47 AM
If you go this route I would recommend getting 6 flanges.
(2) for the exhaust
(4) for the test pipe and cat,(2 for each)

Otherwise you have to figure out how to bolt them all up :D

Doh! 6 flanges is correct.
exiletalon
07-21-2006, 11:40 AM
ok, well I am upgrading to 3" DP anyway, so would it be best to just go to an exhaust shop, have them make a 3" DP- that goes straight to the cat-back, and then cut out the last portion (the exact length of the cat)
and weld flanges on on every end ( 6 flanges)- this will pass emissions?
sbiggi
07-21-2006, 12:42 PM
ok, well I am upgrading to 3" DP anyway, so would it be best to just go to an exhaust shop, have them make a 3" DP- that goes straight to the cat-back, and then cut out the last portion (the exact length of the cat)
and weld flanges on on every end ( 6 flanges)- this will pass emissions?

Yup, that would be the ideal thing to do.