Resonator Delete N55

Eddie135 · 02-01-2012, 03:37 PM

Hi all

I wanted to remove the resonator just before the rear muffler to make it slightly louder. Will replace it with a Y-section pipe.

Will this affect my car performance?

KingOfJericho · 02-01-2012, 05:18 PM

It's just a reverberation chamber so the exhaust flow will be almost identical.

Resonator internal:

Streetsweeper360 · 02-01-2012, 05:28 PM

Quote:

Originally Posted by KingOfJericho

It's just a reverberation chamber so the exhaust flow will be almost identical.

Resonator internal:

Is that the stocker?

Dackelone · 02-01-2012, 05:35 PM

Quote:

Originally Posted by Streetsweeper360

Is that the stocker?

No.

This is what the stock N55 mid pipes look like...

Name: n55_mid+pipes____SFPLImage155277.jpg
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Streetsweeper360 · 02-01-2012, 05:40 PM

Quote:

Originally Posted by Dackelone

No.

This is what the stock N55 mid pipes look like...

Attachment 638751

I meant the internal part?

RaihaX · 02-01-2012, 06:29 PM

Quote:

Originally Posted by Streetsweeper360

I meant the internal part?

no because its not from a stock resonator ?

Eddie135 · 02-01-2012, 07:47 PM

Thanks guys, good to know.

KingOfJericho · 02-02-2012, 06:20 AM

The internals of any resonator will essentially be a straight tube with holes to help deaden sound. The stock one is shaped like a Y but the concept is the same.

Tech112 · 02-02-2012, 07:19 AM

I replaced my resonator with the BMW perfomance one (kept stock muffler) and the sound is awesome. No noticable power increase. It will drone a bit if your can flap is open.

Streetsweeper360 · 02-02-2012, 02:29 PM

Quote:

Originally Posted by KingOfJericho

The internals of any resonator will essentially be a straight tube with holes to help deaden sound. The stock one is shaped like a Y but the concept is the same.

True ,but is the core a perforated or louver ?

KingOfJericho · 02-02-2012, 02:39 PM

The moral of the story is that swapping out the resonator will not *negatively* affect performance.

Eddie135 · 02-02-2012, 03:28 PM

Quote:

Originally Posted by Tech112

I replaced my resonator with the BMW perfomance one (kept stock muffler) and the sound is awesome. No noticable power increase. It will drone a bit if your can flap is open.

That is my next step, BMW resonator delete. Currently, I kept my butterfly valve fully open. Like the drone but not enough.

Eddie135 · 02-02-2012, 03:30 PM

Quote:

Originally Posted by KingOfJericho

The moral of the story is that swapping out the resonator will not *negatively* affect performance.

Thanks KingOfJericho, that answered my concern on the performance.

KingOfJericho · 02-02-2012, 03:38 PM

my flap is open and I'm down two cats and have zero drone (N54 car)

Eddie135 · 02-02-2012, 04:06 PM

Quote:

Originally Posted by KingOfJericho

my flap is open and I'm down two cats and have zero drone (N54 car)

You might want to replace your N54 midpipes to N55 ones to get the drone.

KingOfJericho · 02-02-2012, 04:20 PM

they are swapped... that's how I'm down 2 cats.

Streetsweeper360 · 02-03-2012, 05:30 AM

3 inch .d.ps ,not cats at all,and valve open at all times with zero drone !

TT1351 · 02-03-2012, 12:59 PM

I have A BMW Performance Y section for sale with clamps is anyone is interested. One of the threads has been drilled out due to a broken bolt, but a nut on the other side captures the bold fine with no issues. What the hell, will also include a copper exhaust nut if anyone buys this. $115.00 shipped to lower 48 Fran

M3s4me@aol.com

TwinTurboed · 11-21-2013, 07:18 PM

I did a mid pipe cats and resonator delete with stock muffler still attached, the exhaust is now a little raspy at low rpm. Will welding the resonator back on get rid of the rasp?

bmw0bsession · 11-22-2013, 11:39 AM

I did it several months ago on my n55, just sounds a little louder. Performance is the same

potxoli · 11-22-2013, 10:41 PM

does anybody know what the part number for the BMW performance Y pipe is? Can it be bought separately from the performance exhaust?

e36addict · 11-25-2013, 10:37 AM

Quote:

Originally Posted by Tech112

I replaced my resonator with the BMW perfomance one (kept stock muffler) and the sound is awesome. No noticable power increase. It will drone a bit if your can flap is open.

Pretty much this. The sound improvement is subtle but excellent, especially with the DCT fart sound on upshifts. Much more metallic and raspy, I love it.

It's pretty funny when you look inside the resonator though, it's identical to the Y-pipe but only has about a 1/2 inch section that's perforated..

02-01-2012, 03:37 PM	#1
Eddie135 N55 Commando 55 Rep 797 Posts Drives: 135i - DCT - N55 Join Date: Jul 2011 Location: Melbourne iTrader: (0)	Resonator Delete N55 Hi all I wanted to remove the resonator just before the rear muffler to make it slightly louder. Will replace it with a Y-section pipe. Will this affect my car performance?
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02-01-2012, 05:18 PM	#2
KingOfJericho Major General 2452 Rep 7,341 Posts Drives: Yes Join Date: Aug 2007 Location: CT iTrader: (1) Garage List 2010 135i Coupe [5.26]	It's just a reverberation chamber so the exhaust flow will be almost identical. Resonator internal: __________________ The views and opinions expressed in this post are those of the author and do not necessarily reflect the official policy or position of Bimmerpost. 2018 Jeep Grand Cherokee High Altitude Hemi \| 2010 S4 Sold \| 2010 BMW 135i Retired \| 2006 Lotus Exige Sold
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02-01-2012, 07:47 PM	#7
Eddie135 N55 Commando 55 Rep 797 Posts Drives: 135i - DCT - N55 Join Date: Jul 2011 Location: Melbourne iTrader: (0)	Thanks guys, good to know.
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02-02-2012, 06:20 AM	#8
KingOfJericho Major General 2452 Rep 7,341 Posts Drives: Yes Join Date: Aug 2007 Location: CT iTrader: (1) Garage List 2010 135i Coupe [5.26]	The internals of any resonator will essentially be a straight tube with holes to help deaden sound. The stock one is shaped like a Y but the concept is the same. __________________ The views and opinions expressed in this post are those of the author and do not necessarily reflect the official policy or position of Bimmerpost. 2018 Jeep Grand Cherokee High Altitude Hemi \| 2010 S4 Sold \| 2010 BMW 135i Retired \| 2006 Lotus Exige Sold
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02-02-2012, 07:19 AM	#9
Tech112 New Member 0 Rep 25 Posts Drives: 2011 135i N55 DCT (sold) Join Date: Oct 2011 Location: Montreal iTrader: (0)	I replaced my resonator with the BMW perfomance one (kept stock muffler) and the sound is awesome. No noticable power increase. It will drone a bit if your can flap is open. __________________ 12.669 @ 112.90 2011 BMW 135i DCT N55: 12.669 @ 112.900 MPH
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02-02-2012, 02:39 PM	#11
KingOfJericho Major General 2452 Rep 7,341 Posts Drives: Yes Join Date: Aug 2007 Location: CT iTrader: (1) Garage List 2010 135i Coupe [5.26]	The moral of the story is that swapping out the resonator will not negatively affect performance. __________________ The views and opinions expressed in this post are those of the author and do not necessarily reflect the official policy or position of Bimmerpost. 2018 Jeep Grand Cherokee High Altitude Hemi \| 2010 S4 Sold \| 2010 BMW 135i Retired \| 2006 Lotus Exige Sold
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02-02-2012, 03:38 PM	#14
KingOfJericho Major General 2452 Rep 7,341 Posts Drives: Yes Join Date: Aug 2007 Location: CT iTrader: (1) Garage List 2010 135i Coupe [5.26]	my flap is open and I'm down two cats and have zero drone (N54 car) __________________ The views and opinions expressed in this post are those of the author and do not necessarily reflect the official policy or position of Bimmerpost. 2018 Jeep Grand Cherokee High Altitude Hemi \| 2010 S4 Sold \| 2010 BMW 135i Retired \| 2006 Lotus Exige Sold
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02-02-2012, 04:20 PM	#16
KingOfJericho Major General 2452 Rep 7,341 Posts Drives: Yes Join Date: Aug 2007 Location: CT iTrader: (1) Garage List 2010 135i Coupe [5.26]	they are swapped... that's how I'm down 2 cats. __________________ The views and opinions expressed in this post are those of the author and do not necessarily reflect the official policy or position of Bimmerpost. 2018 Jeep Grand Cherokee High Altitude Hemi \| 2010 S4 Sold \| 2010 BMW 135i Retired \| 2006 Lotus Exige Sold
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02-03-2012, 05:30 AM	#17
Streetsweeper360 Banned 4 Rep 120 Posts Drives: 135 I Join Date: Jan 2012 Location: ARound! iTrader: (0)	3 inch .d.ps ,not cats at all,and valve open at all times with zero drone !
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02-03-2012, 12:59 PM	#18
TT1351 Captain 508 Rep 929 Posts Drives: 135, GTS, E30 M3+ Join Date: Dec 2008 Location: Massachusetts iTrader: (2)	I have A BMW Performance Y section for sale with clamps is anyone is interested. One of the threads has been drilled out due to a broken bolt, but a nut on the other side captures the bold fine with no issues. What the hell, will also include a copper exhaust nut if anyone buys this. $115.00 shipped to lower 48 Fran M3s4me@aol.com
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11-21-2013, 07:18 PM	#19
TwinTurboed Turbo Power 49 Rep 364 Posts Drives: 135i Join Date: Dec 2012 Location: Somewhere iTrader: (0)	I did a mid pipe cats and resonator delete with stock muffler still attached, the exhaust is now a little raspy at low rpm. Will welding the resonator back on get rid of the rasp? __________________ BSM 135i - CDV Delete \| Bilstein \| Eibach \| M3 FSB \| Whiteline
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11-22-2013, 11:39 AM	#20
bmw0bsession Captain 82 Rep 847 Posts Drives: 2011 135i M Sport Join Date: Feb 2013 Location: Burbank, CA iTrader: (3) Garage List 2011 BMW 135i [0.00]	I did it several months ago on my n55, just sounds a little louder. Performance is the same __________________ BMW Performance Kidney Grille, CF Lip Spoiler, CF Diffusser, Blackline LCI Tailights, Magnaflow Full Exhaust, BMS Intake, Jb4 w/ E85, Meth Injection, BMS DP, VRSF 5" Intercooler, CP-E Charge Pipe, KW CS Coilover, M3 Subframe Bushings, VMR VB3 Wheels, Stage 2 Fuel Pump, M3 Control Arms, Dinan Camber Plates, Pure Stage 2.
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11-22-2013, 10:41 PM	#21
potxoli First Lieutenant 138 Rep 353 Posts Drives: 2016 SO F80 Join Date: Feb 2011 Location: boston iTrader: (2)	does anybody know what the part number for the BMW performance Y pipe is? Can it be bought separately from the performance exhaust?
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