remove center / rear mufflers? - BMW 3-Series (E90 E92) Forum

JonDiesel · 02-19-2013, 12:13 PM

I've seen a ton of posts here and some other places on people doing aftermarket exhausts or replacing exhausts and removing dpf etc but has anyone removed center and rear mufflers and put straight pipe? this is an easy mod even for leases as you can buy the exhaust connectors from bmw and do no welding .. and attach stock exhaust when you return the car I'm just wondering how it would sound ... might Wing this soon just wanted opinions

Got_Diesel · 02-19-2013, 01:03 PM

I believe it has been done.

chenry · 02-19-2013, 01:14 PM

From what I understand the net gains (whether that be sound or performance) are next to nothing

Puerto Rican 335d · 02-19-2013, 01:38 PM

Ask Chris he had his done and basically nothing happened the only way is to remove the DPF and downpipe then you will see any gains

floydarogers · 02-19-2013, 01:56 PM

Quote:

Originally Posted by JonDiesel

I've seen a ton of posts here and some other places on people doing aftermarket exhausts or replacing exhausts and removing dpf etc but has anyone removed center and rear mufflers and put straight pipe? this is an easy mod even for leases as you can buy the exhaust connectors from bmw and do no welding .. and attach stock exhaust when you return the car I'm just wondering how it would sound ... might Wing this soon just wanted opinions

There is no center muffler on our diesels - that is the SCR catalyst.

Ron1n · 02-19-2013, 02:15 PM

There aren't any gains aside from a less muted (and by less muted, you actually get one) exhaust note. Also, the removal of the DPF increases exhaust pressure, and that has to be accounted for.

Puerto Rican 335d · 02-19-2013, 02:17 PM

yes I forgot that one but I beleive it has been done in Europe with great gains

Ron1n · 02-19-2013, 02:29 PM

Simple removal on any car doesn't yield great gains...this is a supporting mod, not a primary one.

Concentric190 · 02-19-2013, 04:02 PM

I removed my rear section muffler with straight pipes. No changes.

JonDiesel · 02-19-2013, 05:06 PM

yeah I didn't really care about the gains at this point maybe some exhaust note and a little turbo whine but looks like that can't be had with this mod.. the car goes back in 2 years so I don't want to get into any crazy mods but hey it was worth a try!!

02-19-2013, 12:13 PM	#1
JonDiesel Private First Class Drives: 2011 BMW 335d Join Date: Dec 2011 Location: New Jersey Posts: 115 iTrader: (0)	remove center / rear mufflers? I've seen a ton of posts here and some other places on people doing aftermarket exhausts or replacing exhausts and removing dpf etc but has anyone removed center and rear mufflers and put straight pipe? this is an easy mod even for leases as you can buy the exhaust connectors from bmw and do no welding .. and attach stock exhaust when you return the car I'm just wondering how it would sound ... might Wing this soon just wanted opinions __________________ 11 335D - Deep sea Blue on O/B - Prem/Sports/Navi/CW 07 X3 3.0si- Monaco Blue on Grey Prem/Comfort/CW/Navi
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02-19-2013, 01:38 PM	#4
Puerto Rican 335d Captain Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico Posts: 959 iTrader: (0)	Ask Chris he had his done and basically nothing happened the only way is to remove the DPF and downpipe then you will see any gains __________________ RENNtech Flash/WAGNER IC VMR710 19"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack Amsoil Cetane Boost Diesel Fuel Additive Amsoil Diesel Fuel Additive Concentrate

02-19-2013, 02:15 PM	#6
Ron1n Speed Demon Drives: '10 335d E90 Join Date: Oct 2009 Location: The 858 Posts: 3,242 iTrader: (4) Garage List 2010 335d [5.00]	There aren't any gains aside from a less muted (and by less muted, you actually get one) exhaust note. Also, the removal of the DPF increases exhaust pressure, and that has to be accounted for. __________________

02-19-2013, 02:17 PM	#7
Puerto Rican 335d Captain Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico Posts: 959 iTrader: (0)	yes I forgot that one but I beleive it has been done in Europe with great gains __________________ RENNtech Flash/WAGNER IC VMR710 19"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack Amsoil Cetane Boost Diesel Fuel Additive Amsoil Diesel Fuel Additive Concentrate

02-19-2013, 02:29 PM	#8
Ron1n Speed Demon Drives: '10 335d E90 Join Date: Oct 2009 Location: The 858 Posts: 3,242 iTrader: (4) Garage List 2010 335d [5.00]	Simple removal on any car doesn't yield great gains...this is a supporting mod, not a primary one. __________________

02-19-2013, 01:03 PM	#2
Got_Diesel Private Drives: 335d Join Date: Dec 2012 Location: United States Posts: 56 iTrader: (0)	I believe it has been done.

02-19-2013, 01:14 PM	#3
chenry Private First Class Drives: 2011 335D M Sport blahblahblah Join Date: Feb 2012 Location: SoCal Posts: 121 iTrader: (0)	From what I understand the net gains (whether that be sound or performance) are next to nothing

02-19-2013, 04:02 PM	#9
Concentric190 Second Lieutenant Drives: M3 turbo Join Date: Mar 2011 Location: Willowbrook, IL Posts: 251 iTrader: (0) Garage List 1997 BMW M3 [0.00] 2009 BMW 335d [0.00] 1995 BMW M3 [0.00]	I removed my rear section muffler with straight pipes. No changes. __________________ ///Andres 09 335d evolve tuned - 327whp / 490wtq -- 13.0@105 95 M3 Turbo - Built 3.0l s52, PTE74GTQ, AEM EMS & CDI

02-19-2013, 05:06 PM	#10
JonDiesel Private First Class Drives: 2011 BMW 335d Join Date: Dec 2011 Location: New Jersey Posts: 115 iTrader: (0)	yeah I didn't really care about the gains at this point maybe some exhaust note and a little turbo whine but looks like that can't be had with this mod.. the car goes back in 2 years so I don't want to get into any crazy mods but hey it was worth a try!! __________________ 11 335D - Deep sea Blue on O/B - Prem/Sports/Navi/CW 07 X3 3.0si- Monaco Blue on Grey Prem/Comfort/CW/Navi

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