N55 with AR catless downpipe review

[collegemt]

Was it difficult to remove the cat?

This might be a great mod for N55 owners who want a cheap catless downpipe. However when going to delaer or returning to stock might get tricky.

[shockin330i]

Literally took like 5 minutes to remove th cats..

[M_Anthony]

AR DP + stock catback sounds best. No muffler is too much, Berk sounds too raspy and reminds me of lawn care equipment...

[marcus]

Has anyone tried this DP and the BMW PE? Should sound sweet. I got a vert and Im not sure if it will be too loud.

[TheJerseyDon]

Black e you think the spacer mod would work with stock ecu?

[shockin330i]

Originally Posted by collegemt

Was it difficult to remove the cat?

This might be a great mod for N55 owners who want a cheap catless downpipe. However when going to delaer or returning to stock might get tricky.

My friend ran his stock catless downpipe. Went from a 13.6 to a 13.2 and the car sounds mean!

[shockin330i]

Originally Posted by maxnix

You need to get out of the valley more often. Really.

I do, Been all over the place. I like driving.

[shockin330i]

*double post*

[XCC Motorsports]

Originally Posted by TheJerseyDon

Black e you think the spacer mod would work with stock ecu?

If you're referring to the non fouler method. Yes it does work. I followed the ops instructions and I'm running the AR Design N55 downpipe using the drilled out non fouler on the secondary o2 sensor to prevent the check engine light. I have gone about 200+ miles now on it in various conditions without any problems.

[TheJerseyDon]

Tried doing a search for this "non fouler method" i cant find it maybe you can point me? many thanks

Originally Posted by XCC Motorsports

If you're referring to the non fouler method. Yes it does work. I followed the ops instructions and I'm running the AR Design N55 downpipe using the drilled out non fouler on the secondary o2 sensor to prevent the check engine light. I have gone about 200+ miles now on it in various conditions without any problems.

[TheJerseyDon]

google works.. for the dumb question!

Originally Posted by TheJerseyDon

Tried doing a search for this "non fouler method" i cant find it maybe you can point me? many thanks

[black e]

try this:http://vibrantperformance.com/catalo...oducts_id=1605

[JB135MDCT]

Originally Posted by maxnix

Ever been to LA in the 60's, or flown in to any major metropolis?

That brown bowl of air is pollution, something catalytic converters help lessen. In fact, even today in LA, the air coming out a modern exhaust is a little bet better on a bad day then what went in.

Something to think about, especially if everyone dumped their converters.

I enhaled the Detroit Michigan Green bowl of air many years ago. Ok, so our air is clean. The pollution created elseware is 10 times worse than what it cleans up in the USA and we live on the same plant.

Power and Industry are the major polluters of the world, not automobiles. Efficiency allone can outperform the benefits of CAT in the relm of the global environment. If you through global dimming into the equation you may understand what I am talking about.

So I say dump all the CATs, they cause more harm than good.

[Superfly]

Hello,

I'm waiting for my AR Design DP, in your opinion is it possible to use this 02 sensor spacer :
http://www.nsbconcept.com/940-insert...pport-m18.html

Thanks in advance.

[black e]

added a video of my new setup with the Hartge exhaust to the first post

[UdubBadger]

hartge sounds good, I'll post a video of my bastuck when the DP's get put on next week.

[UdubBadger]

catless was like $300 less than catted...

[mineo77]

Originally Posted by BimmerEngineer

No real performance gain to be had between the two but maybe 1-2 hp.... Slight sound difference AND not worth the price difference to do catless....

[competition]

hartge sounds much quieter than the stock exhaust. but I LOVE IT!

[first350]

Originally Posted by XCC Motorsports

If you're referring to the non fouler method. Yes it does work. I followed the ops instructions and I'm running the AR Design N55 downpipe using the drilled out non fouler on the secondary o2 sensor to prevent the check engine light. I have gone about 200+ miles now on it in various conditions without any problems.

Update? Still no CEL with the non-fouler method?

Originally Posted by black e

The OEM pipe is very heavy because it's got 2 cats in it, the first has to be at least 600 cell and the second 400 cell. it also necks down allot right after the turbo as you can see in the pics .

Question: Does the OEM only have those 2 O2 sensors (Pre-Cat), and middle? It looks like I could drill out the 2nd cat in the DP and would never need to worry about a CEL. Thoughts?

Thanks!

[first350]

Here's what I mean for primary and secondary cats and O2 sensors...looks like there's not an O2 sensors after the 2nd cat, so it can be removed without the ECU picking up an issue and setting a CEL.

thoughts?

[Eurokide82]

Anyone here selling a AR downpipe for a n55

Thanks!