remove center / rear mufflers?

JonDiesel@ColemanAutobody · 02-19-2013, 11:13 AM

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, 12:03 PM

I believe it has been done.

chenry · 02-19-2013, 12:14 PM

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

Puerto Rican 335d · 02-19-2013, 12:38 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, 12:56 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, 01:15 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, 01:17 PM

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

Ron1n · 02-19-2013, 01:29 PM

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

Concentric190 · 02-19-2013, 03:02 PM

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

JonDiesel@ColemanAutobody · 02-19-2013, 04:06 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, 11:13 AM	#1
JonDiesel@ColemanAutobody Private First Class 14 Rep 124 Posts Drives: 2011 BMW 335d Join Date: Dec 2011 Location: New Jersey 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
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02-19-2013, 12:03 PM	#2
Got_Diesel Second Lieutenant 20 Rep 298 Posts Drives: 335d Join Date: Dec 2012 Location: United States iTrader: (0)	I believe it has been done.
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02-19-2013, 12:14 PM	#3
chenry Colonel 2358 Rep 2,964 Posts Drives: BMWs Join Date: Feb 2012 Location: SoCal Huntington Beach iTrader: (8)	From what I understand the net gains (whether that be sound or performance) are next to nothing
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02-19-2013, 12:38 PM	#4
Puerto Rican 335d Brigadier General 229 Rep 3,489 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) 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(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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02-19-2013, 01:15 PM	#6
Ron1n Speed Demon 205 Rep 3,690 Posts Drives: 2021 M5C Join Date: Oct 2009 Location: Irvine iTrader: (6) Garage List 2021 M5 Competition [0.00] 2016 BMW 550i [0.00] 2011 335is [0.00] 2009 E93 M3 [10.00] 2010 335d [9.50]	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. __________________ Current: '21 M5C, '15 X6 50i Previous: '18 M550i, '16 550i, '11 335is, '09 E93 M3 DCT, '10 E90 335d, '07 E90 328i
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02-19-2013, 01:17 PM	#7
Puerto Rican 335d Brigadier General 229 Rep 3,489 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	yes I forgot that one but I beleive it has been done in Europe with great gains __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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02-19-2013, 01:29 PM	#8
Ron1n Speed Demon 205 Rep 3,690 Posts Drives: 2021 M5C Join Date: Oct 2009 Location: Irvine iTrader: (6) Garage List 2021 M5 Competition [0.00] 2016 BMW 550i [0.00] 2011 335is [0.00] 2009 E93 M3 [10.00] 2010 335d [9.50]	Simple removal on any car doesn't yield great gains...this is a supporting mod, not a primary one. __________________ Current: '21 M5C, '15 X6 50i Previous: '18 M550i, '16 550i, '11 335is, '09 E93 M3 DCT, '10 E90 335d, '07 E90 328i
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02-19-2013, 03:02 PM	#9
Concentric190 Second Lieutenant 7 Rep 264 Posts Drives: 335d Join Date: Mar 2011 Location: Willowbrook, IL 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 97 M3 NASA TTB build for 2014!
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02-19-2013, 04:06 PM	#10
JonDiesel@ColemanAutobody Private First Class 14 Rep 124 Posts Drives: 2011 BMW 335d Join Date: Dec 2011 Location: New Jersey 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!!
	Appreciate 0 Quote