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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > reommendations for aftermarket downpipe n55
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      10-26-2013, 04:47 PM   #1
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reommendations for aftermarket downpipe n55

I'm doing some research and want to know what the nicest sounding downpipe there is for the stock cat back..

thoughts?

challenge, er?
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      10-26-2013, 10:09 PM   #2
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Depends on the rest of the exhaust system only. The DP is nothing but a pipe.
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      10-26-2013, 10:53 PM   #3
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Quote:
Originally Posted by Krelle
Depends on the rest of the exhaust system only. The DP is nothing but a pipe.
let's say I'm sticking with stock. I'm looking at the challenge HFC dp or er carless one.
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      10-27-2013, 03:08 PM   #4
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They're all going to sound the same.

With a down pipe, you always want the biggest and freest flowing one u can get, so go catless.
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      10-27-2013, 03:31 PM   #5
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Quote:
Originally Posted by F32 View Post
They're all going to sound the same.

With a down pipe, you always want the biggest and freest flowing one u can get, so go catless.
Thanks bro. Am thinking the er 4" catless.
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      10-27-2013, 05:04 PM   #6
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I got Catless challenge and it sound insane with stock exhaust ..
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      10-27-2013, 08:36 PM   #7
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Anytime, bro.
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      10-28-2013, 03:52 AM   #8
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Quote:
Originally Posted by ShlemonboostedM View Post
I got Catless challenge and it sound insane with stock exhaust ..
Maybe you can post how it sounds?
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      10-29-2013, 06:55 AM   #9
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Here is what we have for you

ER:
http://www.x-ph.com/er-competition-s...npipe-f30-n55/



AR:
http://www.x-ph.com/ar-design-4-hi-f...-bmw-n55-2011/


BMS:
http://www.x-ph.com/bms-f30-4-catles...011-335-coupe/

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      10-29-2013, 08:36 AM   #10
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Any CEL errors or O2 sensor errors with downpipe installation?

These were very common on the E9X.
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      10-29-2013, 09:19 AM   #11
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Quote:
Originally Posted by HypoGXII View Post
Any CEL errors or O2 sensor errors with downpipe installation?

These were very common on the E9X.
Catless will almost certainly give you a CEL (most people run a tune that clears it automatically). HFC seems to not give them to most people but I have a feeling there are people out there that have gotten them or will in the future.
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      10-29-2013, 10:37 AM   #12
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I have the ER cat less downpipe. Honestly the best investment for the car besides a tune. The car smells while in idle and when you really get on it. The smell of the exhaust puts a smile on my face every time. As far as sound goes its ALOT louder, downshifts will put a smile on your face from the gurgling and crackling of the exhaust note. don't be a newb pull the trigger and get it. And it will throw a cell if you don't have the JB stage 2.
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      10-29-2013, 11:37 AM   #13
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Quote:
Originally Posted by J-boogey View Post
don't be a newb pull the trigger and get it.


I laughed at this, but can't say I disagree with anything.

I've been holding off on getting one my own for some reason (mostly install and want to chat with the service folks to see if they'll whine about any future warranty issues if I popped one of those on).

I'm still leaning toward the challenge HFC solely due to hopes the smell is virtually nonexistant with that version.

Already have a JB4 Stage 2 that really wants to move to a new map...
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      10-29-2013, 12:43 PM   #14
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Quote:
Originally Posted by J-boogey View Post
I have the ER cat less downpipe. Honestly the best investment for the car besides a tune. The car smells while in idle and when you really get on it. The smell of the exhaust puts a smile on my face every time. As far as sound goes its ALOT louder, downshifts will put a smile on your face from the gurgling and crackling of the exhaust note. don't be a newb pull the trigger and get it. And it will throw a cell if you don't have the JB stage 2.
that is sick bro! I should get mine tomorrow. If I can ask, how much did it cost you to install and how long was the install?

I don't mind the smell much, it's not a deal breaker. But damn thats sick its much louder. How do the upshifts sound on the 8AT? Is the banging/popping sound louder when you upshift?
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      10-29-2013, 03:27 PM   #15
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I bought the HFC and it will be delivered to my door within 2 days
i just can't wait more , btw i have MPPK i wonder how it will sound.
my car already sounds insane at stock exhaust when overran
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      10-29-2013, 03:40 PM   #16
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Quote:
Originally Posted by M-terkait View Post
I bought the HFC and it will be delivered to my door within 2 days
i just can't wait more , btw i have MPPK i wonder how it will sound.
my car already sounds insane at stock exhaust when overran
haha thats cool. Yeah I think it makes it more throatier and louder, you won't be disappointed.
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      10-29-2013, 06:12 PM   #17
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Quote:
Originally Posted by vip View Post
that is sick bro! I should get mine tomorrow. If I can ask, how much did it cost you to install and how long was the install?

I don't mind the smell much, it's not a deal breaker. But damn thats sick its much louder. How do the upshifts sound on the 8AT? Is the banging/popping sound louder when you upshift?
the upshifts are crazy, very loud pop and bang, puts a smile on my face all the time as far as install i paid a bmw tech at my dealer $150 to do it.. install is very simple. Took about and hour and 15 mins.
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      10-29-2013, 06:13 PM   #18
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Quote:
Originally Posted by J-boogey View Post
the upshifts are crazy, very loud pop and bang, puts a smile on my face all the time as far as install i paid a bmw tech at my dealer $150 to do it.. install is very simple. Took about and hour and 15 mins.
wow! im so excited haha... yeah that is a good price!!

i'll post vids next week!
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      10-30-2013, 08:38 AM   #19
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Have you installed the ER dp at the dealer :O ?
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      11-01-2013, 07:14 AM   #20
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I forgot to add VRSF and Megan Racing dp, 2 of the cheapest downpipes you can get
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      11-01-2013, 12:05 PM   #21
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Quote:
Originally Posted by mike@x-ph.com View Post
I forgot to add VRSF and Megan Racing dp, 2 of the cheapest downpipes you can get
I assume those are only for n54 motors right?
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      11-01-2013, 12:23 PM   #22
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They do have for N55, but i just noticed you have the F30 not e90 so never mind
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