[barton2002]

Hey guys,

I am seriously considering between catted or catless DP. If my concern about passing the air pollution test, should I go for the catted DP given that I will stick with stock exhaust.

If anyone can confirm with me that catless DP with stock exhaust can still pass the test then, i will, for no doubt, go for catless dp getting the most in terms of HP.

Thanks,
Barton

[Soikiu]

Everything I've heard about a catless / catless DP is that it will always fail and is somewhat illegal.

[krazyking]

Buddy, I was in the same situation as you a while back. Pulled the trigger on a set of AR catless DP's for my 335.

Just get the O2 Downpipe Fix from Burger Tuning and you'll be set

[barton2002]

king, ur right, im dying to get a set.. but then, did u manage to pass the air pollution test? and ur on stock exhaust, right?

So.. Catless DP with stock exhaust -> pass or fail?

Originally Posted by krazyking

Buddy, I was in the same situation as you a while back. Pulled the trigger on a set of AR catless DP's for my 335.

Just get the O2 Downpipe Fix from Burger Tuning and you'll be set

[Minichamps]

If you worry you will fail then you should keep the original parts. Change back to stock before inspection. For sure you will PASS.

[Ryan_M]

Im curious as to how loud it becomes, and what about drone?

[barton2002]

tht is actually a good idea! lolz!! good suggestion. im buying it in a bit.

RYan,

I dunno, but from what i found, it doesnt drone? but volume does go up. esp when ur in idle, the noise level is just the same. but lemme double check on that. or can someone confirm that with us?

THXXX

[K3VMO]

I was under the impression DP's don't cause a drone... But noise levels will increase significantly if it's catless...

[krazyking]

Originally Posted by barton2002

king, ur right, im dying to get a set.. but then, did u manage to pass the air pollution test? and ur on stock exhaust, right?

So.. Catless DP with stock exhaust -> pass or fail?

I just had my car inspected in January so will not need to worry about it until next January However, like I said if you were to get the BMS Downpipe Fix then you will be set because it will 'force readiness', which will pass you

Originally Posted by Ryan_M

Im curious as to how loud it becomes, and what about drone?

It doesn't get too loud. Mostly on cold-start ups and on WOT. Not so much when idling. You will will deff hear the turbos spool more, but no drone.

And yes, catless DP's will be louder than catted DP's. One of the main reasons why people go with DP's is so they can go catless and for better airflow