n55 Exhaust mods

RyanMv4 · 07-08-2010, 10:11 AM

Has anyone done any mods to the stock n55 exhausts yet such as muffler/resonator/cat deletes or any combination. I am thinking about going down that path and was wondering if anyone got into doing it yet

onefastman · 07-08-2010, 01:06 PM

No companies yet but you could just go and get one made.

D.B.S · 07-08-2010, 01:15 PM

Silly Question, we all know the N54 has a total of 4 cats, how many does the N55 have? I know of 1 after the turbo, but what about 2nd cats?

RyanMv4 · 07-08-2010, 01:30 PM

Quote:

Originally Posted by onefastman

No companies yet but you could just go and get one made.

Yeah im not really looking to buy an exhaust im thinking more of like a resonator/cat delete

shockin330i · 07-08-2010, 01:36 PM

Muffler delete is where its at...

ar design · 07-08-2010, 01:38 PM

We are *still* looking for an N55 to develop products on!

shockin330i · 07-08-2010, 01:38 PM

Quote:

Originally Posted by ar design

We are *still* looking for an N55 to develop products on!

I'm up for a drive to colorado...

ar design · 07-08-2010, 01:39 PM

Quote:

Originally Posted by shockin330i

I'm up for a drive to colorado...

If you're serious, give me a call at the shop, 303 351 3515

shockin330i · 07-08-2010, 01:40 PM

I have the whole last week of July off. I'm sure if I left friday I could get there by Saturday.

RyanMv4 · 07-08-2010, 08:34 PM

Anyone have a pic from underneath of the whole exhaust system with the plastic panels removed ?

ciomas · 07-09-2010, 11:43 AM

I do, just came back from Birds today ;]

enjoy

D.B.S · 07-09-2010, 11:53 AM

Ciomas, I can't really tell, but is their only 1 Cat on the N55? I don't see any others on the exhaust system...

ciomas · 07-09-2010, 12:04 PM

there is definitely one on the downpipe, and I would assume there should be 2 additional ones on each side of the exhaust pipes

RyanMv4 · 07-09-2010, 12:23 PM

Thats for the e92 on the sedans i can see two what seem to be smaller secondary cats right before that small crossover but im not sure about a primary one on the downpipe ...

RyanMv4 · 07-09-2010, 12:25 PM

Theres really no giant resonator like the older e90's ... I was planning on doing a res delete but by seeing this there really is no point bc its so small ... any ideas ?

D.B.S · 07-09-2010, 12:42 PM

So we are looking at a total of 3 Cats? 1 on the DP, 2 on the exhaust... Ryan, if anything you may want to do a Cat Delete, or get some HFC's to replace the 2nd cats, if your worried about emissions. I know when I get my N55 X5, i most likely will replace the 2nd Cats with HFC's, probably 2-300 cell count... My question is what is the cell count on the 2nd cats? Are they 600 like the N54 cats?

RyanMv4 · 07-09-2010, 12:47 PM

Yeah i guess if theres a primary cat on the downpipe the cat delete is the way to go... Im guessing its the 600 cell count because from what I can see they are the exact same size at the two secondary cats on the n54 exhaust systems ...

D.B.S · 07-09-2010, 12:56 PM

If they are the same size, then they are most likely 600 cells... The N54 had a total of 2400 (between the 4 Cats). Does the N55 only have 1800? I'm curious to know what the count is on the main Downpipe Cat. I know i've read that the main cat is larger than what is on the N54, so by that reasoning, It's gotta be a pretty high cell count. I'm probably going to swap my OEM cats back onto my 335 and put the HFC's on the X5 when I get it... It's funny though, that they went with a dual exhaust setup on the N55 considering that it's only one Catted Downpipe coming from the Turbo (split into two outlets) Maybe a Single Exhaust Setup would have been better... IDK

Ron1n · 07-09-2010, 01:00 PM

Quote:

Originally Posted by ar design

We are *still* looking for an N55 to develop products on!

How about a 335d? :P

RyanMv4 · 07-09-2010, 01:08 PM

Heres a quick pic i just snapped of the two cats on the sedan ...

ar design · 07-09-2010, 01:12 PM

Quote:

Originally Posted by Ron1n

How about a 335d? :P

Absolutely!

D.B.S · 07-09-2010, 01:20 PM

Quote:

Originally Posted by RyanMv4

Heres a quick pic i just snapped of the two cats on the sedan ...

Yeah, those bad boys are 600's...

07-08-2010, 10:11 AM	#1
RyanMv4 First Lieutenant 37 Rep 374 Posts Drives: 2020 440xi Join Date: Jun 2010 Location: PA iTrader: (2)	n55 Exhaust mods Has anyone done any mods to the stock n55 exhausts yet such as muffler/resonator/cat deletes or any combination. I am thinking about going down that path and was wondering if anyone got into doing it yet
	Appreciate 0 Tweet Quote

07-08-2010, 01:06 PM	#2
onefastman Major General 163 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	No companies yet but you could just go and get one made. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
	Appreciate 0 Quote

07-08-2010, 01:15 PM	#3
D.B.S Lieutenant Colonel 30 Rep 1,748 Posts Drives: '11 X5 35i / '13 S5 Join Date: Jun 2009 Location: Deployed to Kuwait iTrader: (2)	Silly Question, we all know the N54 has a total of 4 cats, how many does the N55 have? I know of 1 after the turbo, but what about 2nd cats? __________________ BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi) 2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune
	Appreciate 0 Quote

07-08-2010, 01:36 PM	#5
shockin330i Brigadier General 807 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	Muffler delete is where its at... __________________ ERnie 2016 BSM/f80/ZCP
	Appreciate 0 Quote

07-08-2010, 01:38 PM	#6
ar design 300 Rep 4,408 Posts Drives: 04 M3 Join Date: Jan 2008 Location: Denver, CO iTrader: (9)	We are still looking for an N55 to develop products on!
	Appreciate 0 Quote

07-08-2010, 01:40 PM	#9
shockin330i Brigadier General 807 Rep 4,784 Posts Drives: 2016 ZCP M3 Join Date: Jan 2007 Location: f y'all, I'm from Texas (RGV) iTrader: (1)	I have the whole last week of July off. I'm sure if I left friday I could get there by Saturday. __________________ ERnie 2016 BSM/f80/ZCP
	Appreciate 0 Quote

07-08-2010, 08:34 PM	#10
RyanMv4 First Lieutenant 37 Rep 374 Posts Drives: 2020 440xi Join Date: Jun 2010 Location: PA iTrader: (2)	Anyone have a pic from underneath of the whole exhaust system with the plastic panels removed ?
	Appreciate 0 Quote

07-09-2010, 11:43 AM	#11
ciomas Captain 35 Rep 679 Posts Drives: M4 Join Date: Feb 2010 Location: 3city PL iTrader: (0)	I do, just came back from Birds today ;] enjoy Attached Images
	Appreciate 0 Quote

07-09-2010, 11:53 AM	#12
D.B.S Lieutenant Colonel 30 Rep 1,748 Posts Drives: '11 X5 35i / '13 S5 Join Date: Jun 2009 Location: Deployed to Kuwait iTrader: (2)	Ciomas, I can't really tell, but is their only 1 Cat on the N55? I don't see any others on the exhaust system... __________________ BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi) 2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune
	Appreciate 0 Quote

07-09-2010, 12:04 PM	#13
ciomas Captain 35 Rep 679 Posts Drives: M4 Join Date: Feb 2010 Location: 3city PL iTrader: (0)	there is definitely one on the downpipe, and I would assume there should be 2 additional ones on each side of the exhaust pipes
	Appreciate 0 Quote

07-09-2010, 12:23 PM	#14
RyanMv4 First Lieutenant 37 Rep 374 Posts Drives: 2020 440xi Join Date: Jun 2010 Location: PA iTrader: (2)	Thats for the e92 on the sedans i can see two what seem to be smaller secondary cats right before that small crossover but im not sure about a primary one on the downpipe ...
	Appreciate 0 Quote

07-09-2010, 12:25 PM	#15
RyanMv4 First Lieutenant 37 Rep 374 Posts Drives: 2020 440xi Join Date: Jun 2010 Location: PA iTrader: (2)	Theres really no giant resonator like the older e90's ... I was planning on doing a res delete but by seeing this there really is no point bc its so small ... any ideas ?
	Appreciate 1 Quote

07-09-2010, 12:42 PM	#16
D.B.S Lieutenant Colonel 30 Rep 1,748 Posts Drives: '11 X5 35i / '13 S5 Join Date: Jun 2009 Location: Deployed to Kuwait iTrader: (2)	So we are looking at a total of 3 Cats? 1 on the DP, 2 on the exhaust... Ryan, if anything you may want to do a Cat Delete, or get some HFC's to replace the 2nd cats, if your worried about emissions. I know when I get my N55 X5, i most likely will replace the 2nd Cats with HFC's, probably 2-300 cell count... My question is what is the cell count on the 2nd cats? Are they 600 like the N54 cats? __________________ BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi) 2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune
	Appreciate 0 Quote

07-09-2010, 12:47 PM	#17
RyanMv4 First Lieutenant 37 Rep 374 Posts Drives: 2020 440xi Join Date: Jun 2010 Location: PA iTrader: (2)	Yeah i guess if theres a primary cat on the downpipe the cat delete is the way to go... Im guessing its the 600 cell count because from what I can see they are the exact same size at the two secondary cats on the n54 exhaust systems ...
	Appreciate 0 Quote

07-09-2010, 12:56 PM	#18
D.B.S Lieutenant Colonel 30 Rep 1,748 Posts Drives: '11 X5 35i / '13 S5 Join Date: Jun 2009 Location: Deployed to Kuwait iTrader: (2)	If they are the same size, then they are most likely 600 cells... The N54 had a total of 2400 (between the 4 Cats). Does the N55 only have 1800? I'm curious to know what the count is on the main Downpipe Cat. I know i've read that the main cat is larger than what is on the N54, so by that reasoning, It's gotta be a pretty high cell count. I'm probably going to swap my OEM cats back onto my 335 and put the HFC's on the X5 when I get it... It's funny though, that they went with a dual exhaust setup on the N55 considering that it's only one Catted Downpipe coming from the Turbo (split into two outlets) Maybe a Single Exhaust Setup would have been better... IDK __________________ BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi) 2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune
	Appreciate 0 Quote

07-09-2010, 01:08 PM	#20
RyanMv4 First Lieutenant 37 Rep 374 Posts Drives: 2020 440xi Join Date: Jun 2010 Location: PA iTrader: (2)	Heres a quick pic i just snapped of the two cats on the sedan ...
	Appreciate 0 Quote