Custom Muffler Delete on Stock N55

Chill Hill · 06-04-2014, 09:45 PM

I know there are plenty of threads about muffler deletes (already read most of them) but couldn't really find my answer.

I've got a stock 2011 135i M Package and want to make the sound more aggressive but not too loud. I don't want to be setting off car alarms in the morning or be heard from miles away.

A muffler delete seems to be what I want but I just don't know really how loud it is. Some threads have people saying its extremely loud while others say its nice. Its too hard to go off of youtube videos..

My only real comparison is on my stock setup I love the sound I get on a cold start but that only lasts like 30 seconds lol. So I want it to be around the loudness of a stock cold start and it could be a little louder as well. Would a muffler delete be ideal for this?

BTW I need a cheap option thats why I'm interested in this..

Thanks!!

Kgolf31 · 06-04-2014, 09:54 PM

Unbolt your exhaust and take if for a spin. You'll know pretty quick if you like it or not

Chill Hill · 06-04-2014, 09:59 PM

Quote:

Originally Posted by Kgolf31

Unbolt your exhaust and take if for a spin. You'll know pretty quick if you like it or not

how easy is that?

SOL3MATiiCKK · 06-04-2014, 11:55 PM

Quote:

Originally Posted by Chill Hill

how easy is that?

Where are u located.? If u were in the Bay Area I'd let you hear my muffler delete in person

rsr552 · 06-04-2014, 11:59 PM

I've custom muffler deleted a stock n55...careful you might get that Whistle sound if you get a custom mufflerless midpipe back exhaust made.

Chill Hill · 06-05-2014, 02:58 AM

Quote:

Originally Posted by SOL3MATiiCKK

Where are u located.? If u were in the Bay Area I'd let you hear my muffler delete in person

Nah, I'm in Texas lol. Sorry if I'm being annoying, but could you try and describe how loud it is? Do you remember what yours sounded like before the delete on a cold start? lol

Thanks

Chill Hill · 06-05-2014, 03:00 AM

Quote:

Originally Posted by rsr552

I've custom muffler deleted a stock n55...careful you might get that Whistle sound if you get a custom mufflerless midpipe back exhaust made.

What is this whistle sound you speak of????

I planned on just going to a shop and having them simply cut out the muffler and put in a straight pipe and attach it back onto my tips. Is that what you're referring too?

SOL3MATiiCKK · 06-06-2014, 02:23 AM

Quote:

Originally Posted by Chill Hill

Nah, I'm in Texas lol. Sorry if I'm being annoying, but could you try and describe how loud it is? Do you remember what yours sounded like before the delete on a cold start? lol

Thanks

I don't have any whistle sound on mine. It was fairly quiet before and I live in a condo so if I am backed into my parking spot on cold start i set off the my neighbor's car alarm upon cold start. When cruising on the highway its fairly quiet until you're above 90 mph or WOT. Around town it's a bit loud especially from the outside so be aware of cops. If you don't mind it being loud then i would advise to do the muffler delete. I was able to source a muffler flange and I unbolted the oem exhaust and had a shop weld the flange onto my muffler delete piping just in case i ever want to go back to stock my oem piping isn't messed up.

dcaron9999 · 06-06-2014, 06:46 AM

OP: If you like the "cold engine" start sound, have you considered the popular and reversible "Golf-T" mod?

e36addict · 06-06-2014, 07:37 AM

Elsabor67 · 06-06-2014, 07:45 AM

It is going to be ridiculously loud. I had a couple fo friends that went muffler delete and even with stock downpipe they had to ditch it because it was way too loud. Now if you don't want to wake up people in the middle of the night and set off alarms, then I suggest you to look at a performance muffler like Berk, UUC or Maddad than a straight up muffler delete.

rsr552 · 06-06-2014, 10:10 AM

Quote:

Originally Posted by Chill Hill

What is this whistle sound you speak of????

I planned on just going to a shop and having them simply cut out the muffler and put in a straight pipe and attach it back onto my tips. Is that what you're referring too?

That is exactly what I did actually....

Look at Berk's muffler delete race exhaust design...notice how there's a small portion that connects both pipes...that is there to cancel out or minimize the whistle noise....They had a version1 that didn't have that connecting pipe and those exhausts whistled...it's well documented...

with that said..i don't mind it that much right now...I'll get a berk exhaust later down the line for sure, but atleast now i know i want the muffler version and not the muffler delete because it's too loud lol

:

06-04-2014, 09:45 PM	#1
Chill Hill Private 6 Rep 60 Posts Drives: 2011 BMW 135i Join Date: Feb 2014 Location: Texas iTrader: (0)	Custom Muffler Delete on Stock N55 I know there are plenty of threads about muffler deletes (already read most of them) but couldn't really find my answer. I've got a stock 2011 135i M Package and want to make the sound more aggressive but not too loud. I don't want to be setting off car alarms in the morning or be heard from miles away. A muffler delete seems to be what I want but I just don't know really how loud it is. Some threads have people saying its extremely loud while others say its nice. Its too hard to go off of youtube videos.. My only real comparison is on my stock setup I love the sound I get on a cold start but that only lasts like 30 seconds lol. So I want it to be around the loudness of a stock cold start and it could be a little louder as well. Would a muffler delete be ideal for this? BTW I need a cheap option thats why I'm interested in this.. Thanks!!
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06-04-2014, 09:54 PM	#2
Kgolf31 Brigadier General 459 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	Unbolt your exhaust and take if for a spin. You'll know pretty quick if you like it or not
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06-04-2014, 11:59 PM	#5
rsr552 First Lieutenant 24 Rep 387 Posts Drives: e90 m3 Join Date: Oct 2013 Location: Texas iTrader: (2)	I've custom muffler deleted a stock n55...careful you might get that Whistle sound if you get a custom mufflerless midpipe back exhaust made.
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06-06-2014, 06:46 AM	#9
dcaron9999 Major 157 Rep 1,409 Posts Drives: 2011 135i M package Join Date: Jan 2010 Location: Mirabel, Quebec iTrader: (0)	OP: If you like the "cold engine" start sound, have you considered the popular and reversible "Golf-T" mod? __________________ 2011 X3 35i with M pack + 2011 135i w/6SPMT \| 255 square tire setup \| Quaife 3.46 LSD \| Diff lock down bracket \| Bilstein B8+Swift SpecR springs+H&R FSB \| CDV delete \| BMS Oil Tstat bypass \| ER FMIC & CP \| N54Tuning DP \| GC Street Camber Plates \| M3 FCA +guide rods+RSFB's+Tranny mounts \| Manzo toe arms \| Cobb Stg2 agressive tune \| Hawk DTC70 brake pads \| RB SS brake pistons \| Goodridge SS brake lines \| Custom brake cooling ducts
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06-06-2014, 07:37 AM	#10
e36addict Captain 137 Rep 952 Posts Drives: 2013 X1 35iX Join Date: Jul 2013 Location: Tim @ BMW of Dallas iTrader: (5)	__________________ 13 X1 35iX, 98 Z3 2.8, 01 M Coupe, 96 Z3 1.9 DASC, 95 318ti, 13 smart fortwo
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06-06-2014, 07:45 AM	#11
Elsabor67 aiming for 450..... 303 Rep 2,910 Posts Drives: Totaled :-( Join Date: Feb 2009 Location: Louisiana iTrader: (28) Garage List 2009 135i [10.00]	It is going to be ridiculously loud. I had a couple fo friends that went muffler delete and even with stock downpipe they had to ditch it because it was way too loud. Now if you don't want to wake up people in the middle of the night and set off alarms, then I suggest you to look at a performance muffler like Berk, UUC or Maddad than a straight up muffler delete. __________________ Quote from Ezeedee regarding car mods: "you're only done when you sell the car "
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