Catted DP/Exhaust Options - Page 2 - BMW 3-Series (E90 E92) Forum

E90Company · 09-29-2012, 10:40 AM

OP, I would just get a catless downpipe with the stock exhaust. This setup sounds great on the N55, and isn't overbearingly loud. It will give you the most performance, and you will hear the turbo spool much more. If you want a tad more sound, unplug the actuator in the trunk to open both mufflers at low RPM.

BMW_Belgier · 09-29-2012, 10:52 AM

Quote:

Originally Posted by E90Company

OP, I would just get a catless downpipe with the stock exhaust. This setup sounds great on the N55, and isn't overbearingly loud. It will give you the most performance, and you will hear the turbo spool much more. If you want a tad more sound, unplug the actuator in the trunk to open both mufflers at low RPM.

That doesn't solve the problem OP has...

He wants some more Performance, a sportier Sound and all that without the fear of being off warrenty...

That's actually that what i want too... And i already have the PPK and PE...

E90Company · 09-29-2012, 10:56 AM

Quote:

Originally Posted by BMW_Belgier

That doesn't solve the problem OP has...

He wants some more Performance, a sportier Sound and all that without the fear of being off warrenty...

That's actually that what i want too... And i already have the PPK and PE...

Yes, but he has to remember changing the downpipe to anything aftermarket, catted or not, will void the warranty. You are messing with emissions equipment, and the dealership could bring up backpressure/O2 issues/etc if you modify it. So I would say BMW PE with stock DP (Safe route with warranty, less performance, more sound), or C-Less downpipe stock exhaust (Quieter, more performance, warranty void).

SRT14PimPin07 · 09-29-2012, 12:34 PM

I agree with him ^.....you gotta pay to play!

ry335 · 09-30-2012, 09:01 AM

Quote:

Originally Posted by E90Company

Yes, but he has to remember changing the downpipe to anything aftermarket, catted or not, will void the warranty. You are messing with emissions equipment, and the dealership could bring up backpressure/O2 issues/etc if you modify it. So I would say BMW PE with stock DP (Safe route with warranty, less performance, more sound), or C-Less downpipe stock exhaust (Quieter, more performance, warranty void).

Good points, thanks. What do you have on your car? I may just get the PE for now and enjoy it. I am less worried about the warranty as I am the potential smell from going cat-less. Which is why I was wondering about better catted DP's, but that does not sound like it is worth the money. The BMS DP just seems like too good of a deal for the price if I can put up with the smell.

E90Company · 09-30-2012, 09:13 AM

Quote:

Originally Posted by ry335

Good points, thanks. What do you have on your car? I may just get the PE for now and enjoy it. I am less worried about the warranty as I am the potential smell from going cat-less. Which is why I was wondering about better catted DP's, but that does not sound like it is worth the money. The BMS DP just seems like too good of a deal for the price if I can put up with the smell.

My exhaust is completely stock right now, but I plan on getting C-Less downpipes soon. I have an N54 though, which has secondary cats in the midpipes that cuts back on the smell for us. The N55 RWD cars don't have secondary cats, so if you got a C-Less downpipe you would smell it more (nothing to "filter" the exhaust when fully catless).

I agree with you on catted DP's not being worth the money. They are more expensive than a C-Less downpipe, don't provide as much of a gain, and the restriction is still there, along with the other points regarding warranty etc. Not saying it dousn't provide any gains, it's just less of a gain for more money compared to the C-Less option. If I were in your position, I would just get the BMW PE considering you already have the PPK, and you wouldn't have to worry about any warranty issues down the road.

sti959 · 09-30-2012, 11:28 AM

Quote:

Originally Posted by CombatNinja

Problem is, catless with PPK will give you warning lights and cat efficiency codes. There is no catless DP "fix" for N55s that I know of.

Homemade, no BMW electric plugs but it works!

Cousie · 10-02-2012, 09:37 AM

I have an AR Design catted downpipe + BMW Performance exhaust for almost a year and I never had any warning lights or whatsoever. Even had a faulty valve been fixed under waranty with the catted downpipe still in place...
But... It is loud, sometimes too loud

but I love it.

mashimarho · 10-02-2012, 09:57 AM

Here, I will help you..
These are two videos I'll show you with catless downpipe, BMS JB, and aftermarket exhaust.
As you can see, we get a lot of gurgle and pop

First one is AR DP + BMW PE.
Second one is what my car had: BMS DP + AE Exhaust.

Neither of them are for video, just sound. As you can see.

fasteddie222 · 10-02-2012, 10:08 AM

I need to take a video of my car and put it up so you can hear how awesome it sounds. i have AA exhaust with iCabon downpipes.

ry335 · 10-05-2012, 01:57 PM

Quote:

Originally Posted by fasteddie222

I need to take a video of my car and put it up so you can hear how awesome it sounds. i have AA exhaust with iCabon downpipes.

I live in Miami, maybe I can check out your car at a meet???

fasteddie222 · 10-05-2012, 05:10 PM

Quote:

Originally Posted by ry335

I live in Miami, maybe I can check out your car at a meet???

Yeah man forsure. I go to Ucf but go down to Miami often

09-29-2012, 10:40 AM	#23
E90Company Major General Drives: 335i Join Date: Mar 2012 Location: SFL Posts: 5,550 iTrader: (2)	OP, I would just get a catless downpipe with the stock exhaust. This setup sounds great on the N55, and isn't overbearingly loud. It will give you the most performance, and you will hear the turbo spool much more. If you want a tad more sound, unplug the actuator in the trunk to open both mufflers at low RPM. __________________ FBO N54 6AT

09-29-2012, 12:34 PM	#26
SRT14PimPin07 Captain Drives: BMW 335i Coupe Join Date: Jun 2009 Location: Los Angeles Posts: 723 iTrader: (2)	I agree with him ^.....you gotta pay to play! __________________ 2011 Alpine White E92 335i M-Sport

10-02-2012, 09:57 AM	#31
mashimarho Boss Drives: e92 LCI 335i xDrive™ Join Date: Mar 2010 Location: Grand Rapids, michigan Posts: 5,716 iTrader: (27) Garage List 2012 BMW 335i xDrive [5.00]	Here, I will help you.. These are two videos I'll show you with catless downpipe, BMS JB, and aftermarket exhaust. As you can see, we get a lot of gurgle and pop First one is AR DP + BMW PE. Second one is what my car had: BMS DP + AE Exhaust. Neither of them are for video, just sound. As you can see. __________________ -Sean. 360 FORGED///DynamikiLLu51ions///ER///BMS///KW///VRSF///ARKYM///DD///CYBA///STOPTECH///BMW Performance /// My Progress: http://www.e90post.com/forums/showthread.php?t=770326

10-02-2012, 10:08 AM	#32
fasteddie222 Lieutenant Colonel Drives: 2011 e92 335i Join Date: Dec 2007 Location: Miami/Central Florida Posts: 1,656 iTrader: (4)	I need to take a video of my car and put it up so you can hear how awesome it sounds. i have AA exhaust with iCabon downpipes. __________________

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10-02-2012, 09:37 AM	#30
Cousie New Member Drives: BMW E92 335iA Join Date: Aug 2011 Location: Belgium Posts: 8 iTrader: (0)	I have an AR Design catted downpipe + BMW Performance exhaust for almost a year and I never had any warning lights or whatsoever. Even had a faulty valve been fixed under waranty with the catted downpipe still in place... But... It is loud, sometimes too loud but I love it.