|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Exhaust Question?
|
|
03-22-2016, 09:32 PM | #1 |
Private First Class
25
Rep 121
Posts
Drives: 2011 BMW 335i
Join Date: Oct 2014
Location: United States
|
Exhaust Question?
I found a diagram of the N55 exhaust system and it looks like has one down pipe and branches off to two pipes. Then it appears it connects to a center silencer and then back to two pipes to the rear mufflers. My question is, can you remove that center silencer and would it help with sound? I plan to get a down pipe in the coming months to take off my cat. I have already done the golf mod.
|
03-22-2016, 10:25 PM | #2 |
Colonel
325
Rep 2,015
Posts |
Can you post a picture of the "silencer?"
__________________
WedgePerformance E40 MHD | Performance Exhaust Mod | BMS DP | Vibrant 1790 | BMS Intake | VRSF CP | xHP Stage 3 Michelin PSS | M3 Control Arms LUX v4 LEDs | Shadowline Grills | Lip Spoiler |
Appreciate
0
|
03-24-2016, 09:29 PM | #4 |
Captain
64
Rep 620
Posts
Drives: 2011 335i E90
Join Date: May 2013
Location: Reno, NV
|
Could it be a resonator? If you remove that it'll be louder.
__________________
Dinan Stage 2, Active Autowerke Exhaust, Mishimoto Intercooler, ER Chargepipe
IG: SMH_N55 |
Appreciate
0
|
03-25-2016, 06:20 PM | #5 |
Private First Class
25
Rep 121
Posts
Drives: 2011 BMW 335i
Join Date: Oct 2014
Location: United States
|
|
Appreciate
0
|
03-25-2016, 11:49 PM | #6 |
Second Lieutenant
89
Rep 239
Posts |
Its just an X pipe so the sides of your exhaust can briefly talk to each other which helps with scavenging. As far as sound goes I don't think it does anything.
__________________
M-Sport, 6MT, PPK, JB4 ISO + Rev.3, VRSF 7'' FMIC, VRSF Catless DP, BMS Charge Pipe, MFactory LSD, Öhlins R&T, M3 Control Arms, Rogue 6MT Bushings, Remus Exhaust, Duke Dynamics CF Diffuser, Cyba Scoops, VMR VB3 19s, BMS Clucth Stop
|
Appreciate
0
|
03-29-2016, 12:50 AM | #7 |
Private First Class
25
Rep 121
Posts
Drives: 2011 BMW 335i
Join Date: Oct 2014
Location: United States
|
|
Appreciate
0
|
03-29-2016, 01:06 AM | #8 | |
Lieutenant
62
Rep 582
Posts |
Quote:
Just opinion. |
|
Appreciate
0
|
03-29-2016, 09:19 AM | #9 |
Lieutenant Colonel
247
Rep 1,595
Posts
Drives: 2011 335i xDrive Msport
Join Date: Apr 2013
Location: Orlando
|
I think you read his questions wrong. An X-pipe (correctly done, which we can assume the OEM one is) will help performance and also make the car sound much better. The Xi's do have cats in the mid pipes, but RWD cars do not. You won't gain anything by removing the X-pipe. The exhaust on the 335 is actually very well done and not a large restriction (except the cat in the DP obviously). If you haven't done the DP yet, do that. It makes it sound nicer and is a nice bump in power.
|
Appreciate
0
|
03-29-2016, 12:28 PM | #10 | |
Lieutenant
62
Rep 582
Posts |
Quote:
|
|
Appreciate
0
|
03-29-2016, 12:55 PM | #11 |
Lieutenant Colonel
193
Rep 1,707
Posts |
He is def talking about removing the secondary cats. It sounds like he mistook it for a resonator or silencer. He said the center too, the x-pipe is more towards the rear Joey.
If you are indeed talking about the secondary cat then you can delete it, it doesn't add much volume but makes it a bit more raspy if you have a deep toned exhaust. |
Appreciate
0
|
03-29-2016, 02:00 PM | #12 | |
Lieutenant
62
Rep 582
Posts |
Quote:
Secondary cats are already "separated" pipes, and OP asked if he can make the X-pipe two "separate" pipes.............. |
|
Appreciate
0
|
03-29-2016, 09:29 PM | #13 |
Private First Class
25
Rep 121
Posts
Drives: 2011 BMW 335i
Join Date: Oct 2014
Location: United States
|
Not the second cats. Mine is a RWD and from what I can tell I don't have secondary cats.
|
Appreciate
0
|
03-29-2016, 09:48 PM | #14 |
Brigadier General
544
Rep 3,127
Posts
Drives: 2011 335i e92 DCT
Join Date: Sep 2015
Location: Australia, NSW
|
I don't see why you would remove it, ive never heard of anyone doing it, I doubt it restricts any power.
__________________
/ MHD Stage 2+ / AR CATLESS DP / PE MOD 4 INCH TIPS / BMR FMIC / K&N DROP IN / BMS CP / |
Appreciate
0
|
03-29-2016, 09:54 PM | #15 |
Private First Class
25
Rep 121
Posts
Drives: 2011 BMW 335i
Join Date: Oct 2014
Location: United States
|
|
Appreciate
0
|
04-01-2016, 12:25 AM | #16 |
Brigadier General
544
Rep 3,127
Posts
Drives: 2011 335i e92 DCT
Join Date: Sep 2015
Location: Australia, NSW
|
__________________
/ MHD Stage 2+ / AR CATLESS DP / PE MOD 4 INCH TIPS / BMR FMIC / K&N DROP IN / BMS CP / |
Appreciate
0
|
04-07-2016, 10:47 AM | #17 |
First Lieutenant
34
Rep 328
Posts |
I know this topic has been beaten to death but I still would like to get a bit more clarity . Most of the videos I have seen involved N54 or N55 coupes.
I have a 2011 335xi (N55 ) sedan currently with BMW Performance exhaust and Eurocharged tune. I am thinking of getting a catless DP to make the most out of the tune and need some help/advice. I want to know from someone who has this setup, how loud/raspy it will be. Will it drone at all on the highway? I have been told that on our n55 sedans we have a secondary cat in midpipe as well as a factory resonator so it should be okay. Does it make sense to replace the factory resonator with 1790 Vibrant resonators or that is more or less for people that have coupes that do not have a factory resonator in place. I currently like how my car sounds and don't want it to loose that BMW refinement. Can anyone with E90 n55 sedan pls comment if you have this setup. I need some help/advice deciding if I should go ahead with the catless dp or leave it as is. Thanks guys!
__________________
2018 BMW M2 (LBB)| 6MT| |MPE| Vorsteiner VFF 107| Vorsteiner CF Front Lip| MP Winglets|Evo Comp II Intercooler |Fabspeed Sportcat Downpipe| FTP Boost /Charge Pipes |PT Turbo Inlet Pipe| |Turbosmart DV| |BM3 Stage 2 93 Tune| |BMW Electronic Wheel||KW V3 Coilovers|
IG: https://www.instagram.com/f87lci/ |
Appreciate
0
|
Bookmarks |
Tags |
downpipe, exhaust, mufflers, n55, sound |
|
|