Stock exhaust pipe diameter?

DOUT · 11-12-2010, 06:00 PM

Hey everyone,
What is the pipe diameter of the stock exhaust?
my car is a 2009 e90 335i.
Is it 2.25 in or 2.5 in?

Any help would be greatly appreciated.
Thanks!

EDIT: I used the search button and found in another thread that on an e92 335i it is 2.25 inches. Is it the same for me? http://www.e90post.com/forums/showthread.php?t=159273

For the experts, which x pipe do you think would be better?

http://cgi.ebay.com/ebaymotors/2-25-...ht_1561wt_1167

or

http://www.summitracing.com/parts/IMM-429834

DOUT · 11-12-2010, 07:20 PM

bumpity bump bump bump

NiVeDh · 11-12-2010, 08:00 PM

I believe it's actually 60 mm or about 2.36 inches.

scalbert · 11-12-2010, 08:11 PM

Quote:

Originally Posted by NiVeDh

I believe it's actually 60 mm or about 2.36 inches.

Bingo.

Forcefed3 · 11-12-2010, 08:13 PM

Quote:

Originally Posted by NiVeDh

I believe it's actually 60 mm or about 2.36 inches.

exactly

s.myrr · 11-12-2010, 08:25 PM

Get the 2.5" Magnaflow part # 10791. If you really want to save money and go with aluminized pipe... pick up a $30 dollar ebay pipe, or just have a local shop make one for the same price. I preferred stainless steel, and the best price I found on the Magnaflow was at performance peddler dot com. Great mod for my E90, and done after a lot of research into the subject.

klipseracer · 11-12-2010, 10:19 PM

The exhaust piping also isn't round from beginning to end. Near the secondary cats the piping is flat to accomodate that metal skid plate thing.

DOUT · 11-12-2010, 11:42 PM

Quote:

Originally Posted by klipseracer

The exhaust piping also isn't round from beginning to end. Near the secondary cats the piping is flat to accomodate that metal skid plate thing.

Are you fully catless? Is it bad or bearable?
I am thinking of just getting new piping made from my AR catless downpipes back to the muffler...

NiVeDh · 11-13-2010, 12:31 AM

Quote:

Originally Posted by scalbert

Bingo.

Steve, credit must go to you as you are the one who told me: http://www.e90post.com/forums/showthread.php?t=390738

klipseracer · 11-13-2010, 01:04 AM

Quote:

Originally Posted by DOUT

Are you fully catless? Is it bad or bearable?
I am thinking of just getting new piping made from my AR catless downpipes back to the muffler...

I was 3" catless downpipes that did NOT taper to 2.5" like all AR dp's or any other 3" dp out there. I had custom 3" downpipes made that were true 3" and 3" catless mid pipes that were made to match. It was 3" all the way back to the resonator by the rear axle and that was slip jointed onto the stock muffled exhaust. This was a great sound of which I have video clips for and no, the smell was bearable. If you are somebody who doesn't like car smells and sounds then maybe you'd prefer to avoid it, however I didn't mind... It was definitely noticable, don't get me wrong. Sometimes I'd even think that I smelled the exhaust even when I was nowhere near my vehicle, however gains are gains and the sound was very unique. Tame while idling and low rpm and had a nice exotic like sound when accelerating. I sold this dp/mp setup to a member here that had dinan mufflers. I was excited to hear how they sounded however I've never heard back from him.

e90'D10 · 08-15-2013, 03:15 PM

The stock e92 exhaust tips measure out to be 60mm (2.36 inches) I'll be adding a 2.5 inch tip on my stock exhaust. It shouldn't cause any issues I'm hoping *fingers crossed*

HeavyMetalRocker · 08-15-2013, 04:03 PM

The exhaust shop measured my 2007 e90 piping at just over 2.25" when I was putting my HPF system on if that helps you any!

DOUT · 08-16-2013, 08:48 PM

Thanks for the info guys but this thread is a few years old now.

Fortunately I'm now in a 2013 e92 M3 and have some special mods planned so stay tuned!

11-12-2010, 06:00 PM	#1
DOUT Captain 56 Rep 783 Posts Drives: M3 Join Date: May 2009 Location: Los Angeles iTrader: (2)	Stock exhaust pipe diameter? Hey everyone, What is the pipe diameter of the stock exhaust? my car is a 2009 e90 335i. Is it 2.25 in or 2.5 in? Any help would be greatly appreciated. Thanks! EDIT: I used the search button and found in another thread that on an e92 335i it is 2.25 inches. Is it the same for me? http://www.e90post.com/forums/showthread.php?t=159273 For the experts, which x pipe do you think would be better? http://cgi.ebay.com/ebaymotors/2-25-...ht_1561wt_1167 or http://www.summitracing.com/parts/IMM-429834 __________________ 2021 M3 6MT Brooklyn Grey/Silverstone Previous: 2009 335i ZMP 2013 M3 6MT ZCP Space Grey/Fox Red Last edited by DOUT; 11-12-2010 at 06:08 PM..
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11-12-2010, 07:20 PM	#2
DOUT Captain 56 Rep 783 Posts Drives: M3 Join Date: May 2009 Location: Los Angeles iTrader: (2)	bumpity bump bump bump __________________ 2021 M3 6MT Brooklyn Grey/Silverstone Previous: 2009 335i ZMP 2013 M3 6MT ZCP Space Grey/Fox Red
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11-12-2010, 08:00 PM	#3
NiVeDh Major General 422 Rep 8,003 Posts Drives: '08 E90 335i, '99 E36 M3 Join Date: Apr 2009 Location: Houston, TX & Atlanta, GA iTrader: (132) Garage List 2008 BMW 335i Sedan [8.66]	I believe it's actually 60 mm or about 2.36 inches.
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11-12-2010, 08:25 PM	#6
s.myrr Lieutenant 12 Rep 499 Posts Drives: AW 335i E90 Join Date: Jul 2008 Location: Seattle, WA iTrader: (1)	Get the 2.5" Magnaflow part # 10791. If you really want to save money and go with aluminized pipe... pick up a $30 dollar ebay pipe, or just have a local shop make one for the same price. I preferred stainless steel, and the best price I found on the Magnaflow was at performance peddler dot com. Great mod for my E90, and done after a lot of research into the subject.
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11-12-2010, 10:19 PM	#7
klipseracer Banned 219 Rep 3,012 Posts Drives: 2007 E90 335i, 05 E46 330i Join Date: Aug 2009 Location: Arizona iTrader: (27) Garage List 2007 335i [0.00] 2005 330i [0.00]	The exhaust piping also isn't round from beginning to end. Near the secondary cats the piping is flat to accomodate that metal skid plate thing.
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08-15-2013, 03:15 PM	#11
e90'D10 Major 94 Rep 1,100 Posts Drives: SG 2010 e90 335i Join Date: May 2013 Location: BUCKEYES!! CHAMPS!! iTrader: (0)	The stock e92 exhaust tips measure out to be 60mm (2.36 inches) I'll be adding a 2.5 inch tip on my stock exhaust. It shouldn't cause any issues I'm hoping fingers crossed __________________ NOT Sponsored By Mommy Or Daddy Build Thread 335i 1M http://www.e90post.com/forums/showthread.php?t=1090920 (SOLD) FBOs \| MHD tune V5.1 stage 2\| Alpina B3 Flash
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08-15-2013, 04:03 PM	#12
HeavyMetalRocker Captain 34 Rep 632 Posts Drives: 2007 BMW 335i E90 6MT Join Date: Nov 2012 Location: Dallas, Texas iTrader: (0)	The exhaust shop measured my 2007 e90 piping at just over 2.25" when I was putting my HPF system on if that helps you any! __________________ 2007 335i e90 6mt \| Motiv 750 XR8267 \| RB PCV \| JB4 G5 \| MHD Pump Flash \| Walbro 255lph \| VRSF CP & Tial BOV \| NGK Plugs \| Custom Side Exhaust \| CxRacing FMIC \| Spec 2+ & SSMFW \| StopTech Drilled/Slotted Rotors \| Hawk Performance Pads \| DEFIV Lockdown kit \| Mtec V3 \| Apex PS7s \| 35/15% Llumar ceramic
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08-16-2013, 08:48 PM	#13
DOUT Captain 56 Rep 783 Posts Drives: M3 Join Date: May 2009 Location: Los Angeles iTrader: (2)	Thanks for the info guys but this thread is a few years old now. Fortunately I'm now in a 2013 e92 M3 and have some special mods planned so stay tuned! __________________ 2021 M3 6MT Brooklyn Grey/Silverstone Previous: 2009 335i ZMP 2013 M3 6MT ZCP Space Grey/Fox Red
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