[spooned_n55]

Hi guys,

I am looking at purchasing a pre-owned Vishnu catted downpipe for my 2011 e90 xdrive but have a couple of questions before I pull the trigger. It seems there isn't a ton of info on here about catted downpipes for e90 n55 xdrive, although I didn't do an extensive search.

1) How much increase in noise will there be? Any drone?

2) Will smell be noticable? I have the secondary cats in my midpipe.

3) In terms of emissions, we do OBD testing in my area so what would be required to pass these types of tests? I have a JB4 on my car.

Thanks in advance

[orteeze]

1) How much increase in noise will there be? Any drone?
Can't speak for the Vishnu, but I've had a Cobb Catted and VRSF Catless DP on my car. The Cobb had more drone than a catless or stock for sure.

2) Will smell be noticeable? I have the secondary cats in my midpipe.
Smell is not noticeable at all with a Cobb Hi Flow Cat. I have a RWD (no secondary cats) and couldn't tell the difference from stock and HFC.

3) In terms of emissions, we do OBD testing in my area so what would be required to pass these types of tests? I have a JB4 on my car.
Places like Area Seventy Four offer downpipe fix to help pass emissions.
Not sure how having a HFC works with secandary cats since they are down stream. People have noted that you still get a CEL with HFC.

Hope this helps.

[spooned_n55]

Originally Posted by orteeze

1) How much increase in noise will there be? Any drone?
Can't speak for the Vishnu, but I've had a Cobb Catted and VRSF Catless DP on my car. The Cobb had more drone than a catless or stock for sure.

2) Will smell be noticeable? I have the secondary cats in my midpipe.
Smell is not noticeable at all with a Cobb Hi Flow Cat. I have a RWD (no secondary cats) and couldn't tell the difference from stock and HFC.

3) In terms of emissions, we do OBD testing in my area so what would be required to pass these types of tests? I have a JB4 on my car.
Places like Area Seventy Four offer downpipe fix to help pass emissions.
Not sure how having a HFC works with secandary cats since they are down stream. People have noted that you still get a CEL with HFC.

Hope this helps.

Thanks for the reply!

Would you mind elaborating on the drone part? I certainly don't want too much of that. Was it tolerable?

Also - I'm assuming you were on stock exhaust... How much louder did the downpipe make it outside the car - specifically the catted one?

[Tiago@VRSF]

I'm not sure if that catted downpipe is still available but we have ceramic coated catted downpipes in stock if you're looking for a cost effective solution. A catted downpipe will only increase the exhaust note moderately. The catless downpipe is pretty noticeable.

[spooned_n55]

Originally Posted by Tiago@VRSF

I'm not sure if that catted downpipe is still available but we have ceramic coated catted downpipes in stock if you're looking for a cost effective solution. A catted downpipe will only increase the exhaust note moderately. The catless downpipe is pretty noticeable.

The reason I ask so much specifically about noise, drone, and smell is I drive clients in my car and I cannot have those things. The idea is to give me a bit more power to have fun when I'm alone or driving with friends, not to smell or sound like a racecar when I drive my clients. I will be keeping my secondary cats in the midpipes on, so hoping that with the catted downpipe + secondary cats smell and noise will be very minimal.

[Tiago@VRSF]

The smell with catted downpipes is not noticeable and there is no drone when going with a catted setup.

[mike@x-ph.com]

I am not familiar with the Vishnu one since they stopped offering it years ago.

We offer VRSF, AR Design, Wagner and Cobb catted downpipes.
No fuel smel, no drone with either one if installed correctly

[Kevin39]

Yep,I've got the Wagner high flow catted and I'm Rwd so no midpipe cats either and still no smell. So you shouldn't have any problems at all.

[Jeff@TopGearSolutions]

Not sure I recommend a pre-owned, high flow cats are notorious for wearing down and not performing like they did when they were new.- that includes smell and emissions control.

I'd consider a new option if you want to ensure everything is up to par.

-Wagner catted
-VRSF Catted
-AR Catted