Delete midpipe cats

BMW_Belgier · 06-04-2012, 05:59 AM

Hi guys

Thinking about deleting our xi extra midpipe cats

Where do i get the hardware? Any of you that did this mod (only removing the midpipe cats)

Thank you

BMW_Belgier · 06-06-2012, 06:56 PM

drfrink24 · 06-07-2012, 10:42 AM

Quote:

Originally Posted by BMW_Belgier

Hi guys

Thinking about deleting our xi extra midpipe cats

Where do i get the hardware? Any of you that did this mod (only removing the midpipe cats)

Thank you

They are extra to the XI, or just in general? I thought all stock e9x had secondary cats...

BMW_Belgier · 06-07-2012, 05:40 PM

Apperently the X-Drive models have an extra pair

amclint · 06-08-2012, 11:24 AM

Haven't heard of anyone doing it, just go to a decent exhaust shop and have them save your cats in case you want to weld them back in. I've heard from the 135 and 335i guys that it sounds good, until you add catless DP and then you may need resonators in there to get rid of drone.

kavadarci · 06-08-2012, 11:02 PM

you don't want your cats out. remove the resonator which i did and get bmw performance mufflers or after market like borla, magnaflow, whatever.
keep your cats. they are 400 bucks each, we have 4 and without them your car will fail emission (if you have any in CH).

amclint · 06-09-2012, 01:03 AM

Quote:

Originally Posted by kavadarci

you don't want your cats out. remove the resonator which i did and get bmw performance mufflers or after market like borla, magnaflow, whatever.
keep your cats. they are 400 bucks each, we have 4 and without them your car will fail emission (if you have any in CH).

No emission testing in my state except one big city 4hrs away, I may remove them but only because I think it could benefit me when I start running nitrous again.

kavadarci · 06-09-2012, 08:30 AM

that's another story then.

drfrink24 · 06-10-2012, 08:37 AM

Quote:

Originally Posted by BMW_Belgier

Apperently the X-Drive models have an extra pair

According to realoem.com, the exhaust section with secondary cats are identical P/N between the i and xi, so I don't think the xi has a 3rd set of cats, I certainly didn't notice a 3rd set in my DP install, had it on a rack too.

diamondbimmer92 · 06-10-2012, 09:00 AM

Quote:

Originally Posted by drfrink24

According to realoem.com, the exhaust section with secondary cats are identical P/N between the i and xi, so I don't think the xi has a 3rd set of cats, I certainly didn't notice a 3rd set in my DP install, had it on a rack too.

+1

BMW_Belgier · 06-17-2012, 08:50 PM

Quote:

Originally Posted by kavadarci

you don't want your cats out. remove the resonator which i did and get bmw performance mufflers or after market like borla, magnaflow, whatever.
keep your cats. they are 400 bucks each, we have 4 and without them your car will fail emission (if you have any in CH).

Yes we have emission control

And i already have the performance exhaust

Fredz · 06-19-2012, 01:12 AM

http://www.m3post.com/forums/showthread.php?t=457202

I will doing mine in some days..

Fredz · 06-20-2012, 12:46 AM

Quote:

Originally Posted by Fredz

http://www.m3post.com/forums/showthread.php?t=457202

I will doing mine in some days..

http://www.e90post.com/forums/showth...6#post12186556

06-04-2012, 05:59 AM	#1
BMW_Belgier Lieutenant Colonel 105 Rep 1,597 Posts Drives: E92 335xi n55 Join Date: May 2012 Location: Switzerland iTrader: (0)	Delete midpipe cats Hi guys Thinking about deleting our xi extra midpipe cats Where do i get the hardware? Any of you that did this mod (only removing the midpipe cats) Thank you
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06-06-2012, 06:56 PM	#2
BMW_Belgier Lieutenant Colonel 105 Rep 1,597 Posts Drives: E92 335xi n55 Join Date: May 2012 Location: Switzerland iTrader: (0)
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06-07-2012, 05:40 PM	#4
BMW_Belgier Lieutenant Colonel 105 Rep 1,597 Posts Drives: E92 335xi n55 Join Date: May 2012 Location: Switzerland iTrader: (0)	Apperently the X-Drive models have an extra pair
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06-08-2012, 11:24 AM	#5
amclint boom 12 Rep 598 Posts Drives: 335xi Join Date: Apr 2011 Location: Varies iTrader: (6)	Haven't heard of anyone doing it, just go to a decent exhaust shop and have them save your cats in case you want to weld them back in. I've heard from the 135 and 335i guys that it sounds good, until you add catless DP and then you may need resonators in there to get rid of drone.
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06-08-2012, 11:02 PM	#6
kavadarci Lieutenant 48 Rep 568 Posts Drives: 335xi Join Date: Apr 2012 Location: canada iTrader: (0)	you don't want your cats out. remove the resonator which i did and get bmw performance mufflers or after market like borla, magnaflow, whatever. keep your cats. they are 400 bucks each, we have 4 and without them your car will fail emission (if you have any in CH).
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06-09-2012, 08:30 AM	#8
kavadarci Lieutenant 48 Rep 568 Posts Drives: 335xi Join Date: Apr 2012 Location: canada iTrader: (0)	that's another story then.
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06-19-2012, 01:12 AM	#12
Fredz Private 13 Rep 80 Posts Drives: 335i xDrive 2011 Join Date: Mar 2011 Location: Montreal iTrader: (0) Garage List 2011 BMW 335i xDrive [0.00]	DIY: OEM x-pipe secondary cat removal/gut http://www.m3post.com/forums/showthread.php?t=457202 I will doing mine in some days..
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