Muffler Delete

austinla335d · 08-11-2014, 03:17 PM

I'm looking under my car and very excited about the weight/sound advantage of removing my muffler, but I can't get around some concerns. My plan is to take it to my local exhaust experts, cut off the muffler at the entrance, and replace the path from cut-off point to exhaust tip with the same diameter exhaust tubing. I want to replace exhaust tips with 3.5" tips that don't attract attention, but I haven't started shopping yet without wondering about the following:

#1- Do the few sound clips out there (TDIWyse I believe? Others?) have otherwise stock emissions parts? I'm NOT thinking that the smokey/loud exhausts on youtube are just muffler deletes

#2- Aside from the muffler itself, is anything effected on warranty by removing the muffler? On my 335i they didn't care at all that I had catless downpipes for a while, except that if it threw a code that caused complications and explanations that BMWNA would overtake their authority on. I had the BMS dp-fix installed at that time.

#3- Is there truly an aerodynamic advantage to keeping the muffler? I don't have a drive way to get creative in, nor do I have metal-working capability whatsoever. I've seen what I believe to be TDIWyse under car baffler/splash guard type install... I don't know if I would be able to do something like that.

One thing that might encourage interest on the topic is that I'm going to do the DIY as the exhaust experts do their work. I did it on the 335i forums years ago at the same place, and they liked the involvement and potential business it could bring.

Thanks as always for helping me out guys.

Yozh · 08-11-2014, 09:42 PM

I believe TDI had his DPF gutted in those soundclips. I would vote for more clips under various driving conditions. Don't want rice loud or highway drone.

DieselRacer · 08-12-2014, 02:08 AM

I will only smoke if you remove dpf and cat, the muffler is just for noise...

Puerto Rican 335d · 08-12-2014, 06:50 AM

Our mufflers are hollow I believe Chris or Tdi posted a pic of it and how it was HOLLOW!!! i plan to do mines with double oval tips

GreekboyD · 08-12-2014, 06:53 AM

Quote:

Originally Posted by Puerto Rican 335d

Our mufflers are hollow I believe Chris or Tdi posted a pic of it and how it was HOLLOW!!! i plan to do mines with double oval tips

Amigo, oval tips were cool in the 1970s when lamb chop sideburns and hairy boxes were all the rage.

Puerto Rican 335d · 08-12-2014, 08:23 AM

LOL wait to see these ones my friend has them on this 328 M and they look awesome

austinla335d · 08-12-2014, 11:22 AM

Oval tips are AMG ish.

I'm aware of the muffler's impact, I know it won't smoke or release turbo whistle. I'm interested in removing weight and possibly a little more grunt. If the muffler is hollow and does not have any sort of resonator or expansion chamber inside- not even packing- then removing it will do nothing.

TDIwyse · 08-12-2014, 11:36 AM

Quote:

Originally Posted by austinla335d

Oval tips are AMG ish.

I'm aware of the muffler's impact, I know it won't smoke or release turbo whistle. I'm interested in removing weight and possibly a little more grunt. If the muffler is hollow and does not have any sort of resonator or expansion chamber inside- not even packing- then removing it will do nothing.

http://www.e90post.com/forums/showpo...7&postcount=23

The pipes inside the chamber are basically straight through except for a perforated section near the cross pipe. And there's lots of heavy packing material.

Crawler · 08-12-2014, 11:58 AM

According to my technician CA regards the OEM muffler on this specific car as part of the emissions system.

You may want to verify this.

Puerto Rican 335d · 08-12-2014, 12:36 PM

damn cali LOL

BayE30 · 08-12-2014, 04:34 PM

from my understanding, anything from the cat-back is smog exempt. I do not know if there are specific laws regarding diesel vehicles.

DieselRacer · 08-12-2014, 04:47 PM

I think the mufflers looks bad ass my car from behind, im very low to the ground but you can still see them a bit and it makes the car look finished in the back...

I love the stock exhaust tips as well...

GreekboyD · 08-12-2014, 04:52 PM

Quote:

Originally Posted by DieselRacer

I think the mufflers looks bad ass my car from behind, im very low to the ground but you can still see them a bit and it makes the car look finished in the back...

I love the stock exhaust tips as well...

Dude, nothing about our stock exhaust or tips says "bad ass."

DieselRacer · 08-12-2014, 05:05 PM

Quote:

Originally Posted by GreekboyD

Dude, nothing about our stock exhaust or tips says "bad ass."

Everything on the M sport says bad ass, dual exhaust, M bumpers, it's a diesel, not a gas tuner...

GreekboyD · 08-12-2014, 05:06 PM

Quote:

Originally Posted by DieselRacer

Quote:

Originally Posted by GreekboyD

Dude, nothing about our stock exhaust or tips says "bad ass."

Everything on the M sport says bad ass, dual exhaust, M bumpers, it's a diesel, not a gas tuner...

Every D has dual exhaust with tips that wouldn't scare anyone.

BB_cuda · 08-12-2014, 06:14 PM

Guys, to each his own. If someone wants to put smoke stacks coming out of his rear quarter panels (and I think this would be warped to do), let them do it. I agree with DRacer, I like the stock tips as well. I would like to chunk the mufflers but for entirely different reason.

This boy wants a spare tire stow cavity. I am determined to find a way. But first obstacle will be successful removal of urea tanks without codes popping up.

TorqueAddict · 08-12-2014, 09:13 PM

Quote:

Originally Posted by BB_cuda;

am determined to find a way. But first obstacle will be successful removal of urea tanks without codes popping up.

Jarek from JR Auto Oakville can help. He has done few cars, including mine. No codes whatsoever.

DieselRacer · 08-12-2014, 09:48 PM

Quote:

Originally Posted by GreekboyD

Every D has dual exhaust with tips that wouldn't scare anyone.

Not the new 330d or the 535d so no they don't all have dual exhaust...

GreekboyD · 08-12-2014, 09:53 PM

Quote:

Originally Posted by DieselRacer

Not the new 330d or the 535d so no they don't all have dual exhaust...

I was referring to "our" cars.

DieselRacer · 08-12-2014, 09:59 PM

Quote:

Originally Posted by GreekboyD

I was referring to "our" cars.

That's why OUR cars look bad ass, dual exhaust, one of the complaints on the new D's, haha new D's...

austinla335d · 08-14-2014, 01:13 AM

Quote:

Originally Posted by DieselRacer

Quote:

Originally Posted by GreekboyD

I was referring to "our" cars.

That's why OUR cars look bad ass, dual exhaust, one of the complaints on the new D's, haha new D's...

By that logic a chevy Malibu, Nissan Altima, ford escape etc are all badass.

Btw, I can't even see my mufflers and my car isn't terribly low.

temporaptor · 08-14-2014, 01:25 AM

What shop are you planning to go to for this?

08-11-2014, 03:17 PM	#1
austinla335d Captain 53 Rep 686 Posts Drives: 2011 335d Join Date: Oct 2010 Location: Los Angeles, CA iTrader: (1)	Muffler Delete I'm looking under my car and very excited about the weight/sound advantage of removing my muffler, but I can't get around some concerns. My plan is to take it to my local exhaust experts, cut off the muffler at the entrance, and replace the path from cut-off point to exhaust tip with the same diameter exhaust tubing. I want to replace exhaust tips with 3.5" tips that don't attract attention, but I haven't started shopping yet without wondering about the following: #1- Do the few sound clips out there (TDIWyse I believe? Others?) have otherwise stock emissions parts? I'm NOT thinking that the smokey/loud exhausts on youtube are just muffler deletes #2- Aside from the muffler itself, is anything effected on warranty by removing the muffler? On my 335i they didn't care at all that I had catless downpipes for a while, except that if it threw a code that caused complications and explanations that BMWNA would overtake their authority on. I had the BMS dp-fix installed at that time. #3- Is there truly an aerodynamic advantage to keeping the muffler? I don't have a drive way to get creative in, nor do I have metal-working capability whatsoever. I've seen what I believe to be TDIWyse under car baffler/splash guard type install... I don't know if I would be able to do something like that. One thing that might encourage interest on the topic is that I'm going to do the DIY as the exhaust experts do their work. I did it on the 335i forums years ago at the same place, and they liked the involvement and potential business it could bring. Thanks as always for helping me out guys.
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08-12-2014, 02:08 AM	#3
DieselRacer BMW Advanced Diesel, 2011 BMW 335d M sport... 87 Rep 783 Posts Drives: 2011 335d M sport Join Date: Apr 2014 Location: AZ-NV iTrader: (0) Garage List 1965 shelby cobra ford [0.00] 1965 Shelby Cobra [0.00] 2011 BMW 335d M sport [0.00]	I will only smoke if you remove dpf and cat, the muffler is just for noise... __________________ BMW Advanced Diesel, 2011 335d M sport...
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08-12-2014, 06:50 AM	#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)	Our mufflers are hollow I believe Chris or Tdi posted a pic of it and how it was HOLLOW!!! i plan to do mines with double oval tips __________________ 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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08-12-2014, 08:23 AM	#6
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)	LOL wait to see these ones my friend has them on this 328 M and they look awesome __________________ 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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08-12-2014, 11:22 AM	#7
austinla335d Captain 53 Rep 686 Posts Drives: 2011 335d Join Date: Oct 2010 Location: Los Angeles, CA iTrader: (1)	Oval tips are AMG ish. I'm aware of the muffler's impact, I know it won't smoke or release turbo whistle. I'm interested in removing weight and possibly a little more grunt. If the muffler is hollow and does not have any sort of resonator or expansion chamber inside- not even packing- then removing it will do nothing.
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08-11-2014, 09:42 PM	#2
Yozh Colonel 870 Rep 2,615 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	I believe TDI had his DPF gutted in those soundclips. I would vote for more clips under various driving conditions. Don't want rice loud or highway drone.
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08-12-2014, 11:58 AM	#9
Crawler Private 3 Rep 50 Posts Drives: 2011 335D Join Date: Jan 2013 Location: Sandy Eggo CA iTrader: (0)	According to my technician CA regards the OEM muffler on this specific car as part of the emissions system. You may want to verify this.
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08-12-2014, 12:36 PM	#10
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)	damn cali LOL __________________ 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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08-12-2014, 04:34 PM	#11
BayE30 Lieutenant Colonel 1341 Rep 1,881 Posts Drives: 2011.75 E90 M3 ZCP Join Date: Jul 2014 Location: San Francisco iTrader: (5)	from my understanding, anything from the cat-back is smog exempt. I do not know if there are specific laws regarding diesel vehicles.
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08-12-2014, 04:47 PM	#12
DieselRacer BMW Advanced Diesel, 2011 BMW 335d M sport... 87 Rep 783 Posts Drives: 2011 335d M sport Join Date: Apr 2014 Location: AZ-NV iTrader: (0) Garage List 1965 shelby cobra ford [0.00] 1965 Shelby Cobra [0.00] 2011 BMW 335d M sport [0.00]	I think the mufflers looks bad ass my car from behind, im very low to the ground but you can still see them a bit and it makes the car look finished in the back... I love the stock exhaust tips as well... __________________ BMW Advanced Diesel, 2011 335d M sport...
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08-12-2014, 06:14 PM	#16
BB_cuda Brigadier General 765 Rep 3,557 Posts Drives: 2011 335D Msport, 2013 X5D Join Date: Nov 2011 Location: Clear Lake, Texas iTrader: (0)	Guys, to each his own. If someone wants to put smoke stacks coming out of his rear quarter panels (and I think this would be warped to do), let them do it. I agree with DRacer, I like the stock tips as well. I would like to chunk the mufflers but for entirely different reason. This boy wants a spare tire stow cavity. I am determined to find a way. But first obstacle will be successful removal of urea tanks without codes popping up.
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08-14-2014, 01:25 AM	#22
temporaptor Second Lieutenant 64 Rep 266 Posts Drives: 11 335D MSport / 12 X5 35d Join Date: Feb 2014 Location: SoCal iTrader: (0)	What shop are you planning to go to for this?
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