[8URV8]

I am going with the cobb access port early next week...For you guys that have that as well what other mods have you seen the most power with...should I do, exhaust, intake, downpipes etc. I am looking for the one that you have seen to make the most power for the money...let me know thanks.

BJ

[ar design II]

Downpipes, ETS intercooler, and a tune with that AP and it will feel like a whole new car!

PM me and i can help with pricing on that stuff!

[Bimmer This]

I would do the Cobb AP + downpipes combo if not all three (intercooler).

[mattsfeir]

Downpipes would be great, especially if there isn't any emissions testing where you are. I'm currently running stock downpipes for emissions, but can't wait to switch back to my AR catless ones.

If emissions is an issue and you don't want to switch back and forth, you could do meth and/or an intercooler.

[Bimmer This]

I passed CO emissions with AR downpipes. I can prove it.

[mattsfeir]

Originally Posted by Bimmer This

I passed CO emissions with AR downpipes. I can prove it.

Excellent, was that one of the roadside locations or did you have to go in and be put on the rollers?

Would be much easier for me to just switch out the stock exhaust to pass instead of doing the downpipes too.

[Bimmer This]

I had to be out on the rollers. Passed with flying colors.

[raceyBMW]

Long as you go in with fully warmed up car and have O2 sims, you should probably be able to pass the emissions tests in CO with catless DP's. From what I remember, the mid cats actually do most of the work anyway once the car is running at operating temperature. Andrew can probably chime in on that better though.

[ar design]

Originally Posted by Bimmer This

I passed CO emissions with AR downpipes. I can prove it.

[raceyBMW]

BTW, this exact same question was posted in the N54 forums.

http://www.e90post.com/forums/showthread.php?t=644123

[Bimmer This]

Maybe I should post up my inspection sheet so everyone can see that it was not even close to failing.

[raceyBMW]

I believe you Vincent

[8URV8]

Thanks for all the advice...The tune helped at ton!! I just got my emissions so I will probably do the downpipes because I will not have to get it done again for 2 years and odds are I will not hang on to the car for that long...I will probably do the intercooler too...Between the catless downpipes and the intercooler which one is seing more gains in power?

[Bimmer This]

Downpipes are a better gain.

[ar design]

Catless downpipes will def make more HP, but the intercooler will let you keep it. Give me a call, can explain in depth!

[Bimmer This]

Originally Posted by ar design

Catless downpipes will def make more HP, but the intercooler will let you keep it. Give me a call, can explain in depth!

Make sure you ask him about the TT and when it is going to get done.