N55 E92 335i: Can you add Resonators to Reduce Rasp on N55?

sebasupreme · 01-05-2016, 06:00 PM

Hi,

I know on the N54 you can remove the cats and add resonators to reduce the rasp when you have downpipes and the performance exhaust installed.

I have an N55 so my 335i Coupe doesn't have any secondary cats, but with my VRSF downpipe the sound is very raspy, would I be able to cut and weld resonators on the straight part of the pipe behind the catback performance exhaust or is that not possible to do on an N55?

I'm looking to add 2 Vibrant 1792 Bottle Style Resonator. (one on each pipe)

So basically can I just cut the pipes where it is straight and add 2 resonators (one on each pipe) then cut and weld the pipe on to the other side of the resonator and put everything back together or is that not possible?

Thanks in advance.

My car is a 2012 N55 E92 335i Coupe M Sport 6SM RWD

EB89 · 01-05-2016, 07:33 PM

I don't see why you couldn't do it.

sebasupreme · 01-05-2016, 07:34 PM

Quote:

Originally Posted by EB89

I don't see why you couldn't do it.

this is my first car that I'm modding so I just want to be sure before I start cutting and welding pipes lmao

Dhillon92 · 01-05-2016, 08:53 PM

Just get under the car, it'll be pretty clear where you can put them, side by side. N54 exhaust is almost the same, you can use their pics as reference as well.

sebasupreme · 01-05-2016, 09:33 PM

Quote:

Originally Posted by Dhillon92

Just get under the car, it'll be pretty clear where you can put them, side by side. N54 exhaust is almost the same, you can use their pics as reference as well.

my only concern was that the n55 doesn't come with secondary cats like the n54 so thats why I wasn't sure lol but thanks.

EB89 · 01-05-2016, 10:10 PM

Quote:

Originally Posted by sebasupreme

my only concern was that the n55 doesn't come with secondary cats like the n54 so thats why I wasn't sure lol but thanks.

Just means you have more room to cut and weld them in

sebasupreme · 01-05-2016, 10:33 PM

Quote:

Originally Posted by EB89

Just means you have more room to cut and weld them in

never thought about it that way!

EB89 · 01-05-2016, 11:13 PM

Quote:

Originally Posted by sebasupreme

never thought about it that way!

Haha, good luck

sebasupreme · 01-06-2016, 12:10 AM

Quote:

Originally Posted by EB89

Haha, good luck

what size would I need to put it on the mid pipe? a 2 1/2? or a 2.25?

Dhillon92 · 01-06-2016, 03:16 AM

The stock piping is like ~2.3", people have used both the 1790 (2.25) and 1792 (2.5) with success. Personally I would go with the slightly bigger one, I wouldn't wanna make it smaller than what the piping already is.

sebasupreme · 01-06-2016, 04:30 AM

Quote:

Originally Posted by Dhillon92

The stock piping is like ~2.3", people have used both the 1790 (2.25) and 1792 (2.5) with success. Personally I would go with the slightly bigger one, I wouldn't wanna make it smaller than what the piping already is.

thanks man!

Jsoboti · 01-06-2016, 09:15 AM

Post vids when done!

sebasupreme · 01-06-2016, 04:40 PM

Quote:

Originally Posted by Jsoboti

Post vids when done!

Will do!

shirtpants_ · 01-06-2016, 05:39 PM

Yeah, you weld them in the mid pipes right before the X or H pipe. Check out this thread.
I did exactly what you're planning with the 1790 resonators. Gets rid of 95% of the rasp.

http://www.e90post.com/forums/showthread.php?t=1113288

sebasupreme · 01-06-2016, 07:55 PM

Quote:

Originally Posted by shirtpants_

Yeah, you weld them in the mid pipes right before the X or H pipe. Check out this thread.
I did exactly what you're planning with the 1790 resonators. Gets rid of 95% of the rasp.

http://www.e90post.com/forums/showthread.php?t=1113288

Awesome! Thanks, much appreciated.

Does it really lower the tone of the exhaust though?

Like cruising wise passing someone will they be able to hear it?

Johnny Boost · 01-07-2016, 11:19 PM

Quote:

Originally Posted by sebasupreme

Awesome! Thanks, much appreciated.

Does it really lower the tone of the exhaust though?

Like cruising wise passing someone will they be able to hear it?

Yes, especially during spirited driving.

sebasupreme · 01-08-2016, 03:29 AM

Quote:

Originally Posted by Johnny Boost

Yes, especially during spirited driving.

It will work with a Vanguard V2 exhaust as well correct? I might actually go with that one instead of a Performance Exhaust because there isn't as much rasp and they sound great on N55.

Johnny Boost · 01-08-2016, 11:53 AM

Quote:

Originally Posted by sebasupreme

Quote:

Originally Posted by Johnny Boost

Yes, especially during spirited driving.

It will work with a Vanguard V2 exhaust as well correct? I might actually go with that one instead of a Performance Exhaust because there isn't as much rasp and they sound great on N55.

You will need to figure out the diameter of the vanguard exhaust and get the appropriate resonators.

sebasupreme · 01-08-2016, 12:51 PM

Quote:

Originally Posted by Johnny Boost

You will need to figure out the diameter of the vanguard exhaust and get the appropriate resonators.

sounds good!

EB89 · 01-13-2016, 12:22 AM

Quote:

Originally Posted by sebasupreme

sounds good!

So im interested to see how this goes for you.

Yesterday I had the ar design 4" catless downpipe installed.

I already had the BMW performance Exhaust.

Cold starts are crazy loud, I want them to be way quieter, and low rpm, low gear acceleration is super loud as well, like 1st gear taking off slowly or quickly from a stop, even with a warm engine.

I feel like I cant drive quickly around town anymore without the car sounding like its on a track with straight pipes

Does anyone know if adding resonators will quiet it down?

dannyle27 · 01-13-2016, 01:42 AM

It quieted mine down a little but theres no rasp at all now... After my kittyless downpipe, I couldnt stand it so I ordered a pair of vibrant 1792's. Drone at 2-3k rpm is there still but not as loud and not concerning. Exhaust sounds good now.

E90 335xi · 01-13-2016, 10:11 AM

Quote:

Originally Posted by EB89

So im interested to see how this goes for you.

Yesterday I had the ar design 4" catless downpipe installed.

I already had the BMW performance Exhaust.

Cold starts are crazy loud, I want them to be way quieter, and low rpm, low gear acceleration is super loud as well, like 1st gear taking off slowly or quickly from a stop, even with a warm engine.

I feel like I cant drive quickly around town anymore without the car sounding like its on a track with straight pipes

Does anyone know if adding resonators will quiet it down?

I know exactly what you mean bro. I ended up going back to stock DP cause I couldn't stand the low rpm / low throttle noise.

And it really takes the refined feel away from the car.

I didn't both with resonators. Can't say I miss my downpipe at all though. The spool was faster with it, but I'm not really noticing a big difference in top-end power. When you're making 350whp, another +/- 20whp really doesn't make that much of a difference IMO.

01-05-2016, 06:00 PM	#1
sebasupreme Second Lieutenant 45 Rep 263 Posts Drives: 2012 N55 E92 335i M Sport 6MT Join Date: Mar 2015 Location: Essex County, New Jersey iTrader: (1)	N55 E92 335i: Can you add Resonators to Reduce Rasp on N55? Hi, I know on the N54 you can remove the cats and add resonators to reduce the rasp when you have downpipes and the performance exhaust installed. I have an N55 so my 335i Coupe doesn't have any secondary cats, but with my VRSF downpipe the sound is very raspy, would I be able to cut and weld resonators on the straight part of the pipe behind the catback performance exhaust or is that not possible to do on an N55? I'm looking to add 2 Vibrant 1792 Bottle Style Resonator. (one on each pipe) So basically can I just cut the pipes where it is straight and add 2 resonators (one on each pipe) then cut and weld the pipe on to the other side of the resonator and put everything back together or is that not possible? Thanks in advance. My car is a 2012 N55 E92 335i Coupe M Sport 6SM RWD
	Appreciate 0 Tweet Quote

01-05-2016, 07:33 PM	#2
EB89 Brigadier General 546 Rep 3,127 Posts Drives: 2011 335i e92 DCT Join Date: Sep 2015 Location: Australia, NSW iTrader: (0) Garage List 2011 BMW 335i e92 [0.00]	I don't see why you couldn't do it. __________________ / MHD Stage 2+ / AR CATLESS DP / PE MOD 4 INCH TIPS / BMR FMIC / K&N DROP IN / BMS CP /
	Appreciate 1 Quote

01-05-2016, 08:53 PM	#4
Dhillon92 Captain 82 Rep 605 Posts Drives: '11 335xi Join Date: Jul 2014 Location: Toronto iTrader: (0)	Just get under the car, it'll be pretty clear where you can put them, side by side. N54 exhaust is almost the same, you can use their pics as reference as well.
	Appreciate 0 Quote

01-06-2016, 03:16 AM	#10
Dhillon92 Captain 82 Rep 605 Posts Drives: '11 335xi Join Date: Jul 2014 Location: Toronto iTrader: (0)	The stock piping is like ~2.3", people have used both the 1790 (2.25) and 1792 (2.5) with success. Personally I would go with the slightly bigger one, I wouldn't wanna make it smaller than what the piping already is.
	Appreciate 0 Quote

01-06-2016, 09:15 AM	#12
Jsoboti Lieutenant 28 Rep 583 Posts Drives: 2011 335i E92 M-Sport 6MT Join Date: May 2014 Location: Mississippi iTrader: (0)	Post vids when done! __________________ JB4 G5 ISO FF \| BMS Performance Intake \| BMS Wheel Spacers \| VRSF Catless DP \| Red CYBA Scoops \| Supreme Power Lowering Perches \| VRSF Charge Pipe \| VMR 810 19x8.5 ET35 19x9.5 ET33 \| Michelin PSS 235/265 \| BMS CDV \| BMS Clutch Stop \| 4'' Tips
	Appreciate 0 Quote

01-06-2016, 05:39 PM	#14
shirtpants_ Second Lieutenant 97 Rep 268 Posts Drives: 11 335i Join Date: Jan 2015 Location: orlando iTrader: (1)	Yeah, you weld them in the mid pipes right before the X or H pipe. Check out this thread. I did exactly what you're planning with the 1790 resonators. Gets rid of 95% of the rasp. http://www.e90post.com/forums/showthread.php?t=1113288
	Appreciate 0 Quote

01-13-2016, 01:42 AM	#21
dannyle27 Second Lieutenant 38 Rep 243 Posts Drives: 2018 M3 Join Date: Jun 2015 Location: Boston/San Diego iTrader: (2) Garage List 2014 Honda CBR600RR [0.00] 2011 BMW 335i [0.00]	It quieted mine down a little but theres no rasp at all now... After my kittyless downpipe, I couldnt stand it so I ordered a pair of vibrant 1792's. Drone at 2-3k rpm is there still but not as loud and not concerning. Exhaust sounds good now.
	Appreciate 0 Quote