N55 and Catless Downpipe - Will N54 Midpipe Reduce Cold Start Sound?

bodega_cat · 08-01-2017, 10:19 PM

So I am looking and picking up a dp for my 2013 soon. I've been watching a bunch of vids and reading threads and all that. Everything I came across says the sound is amazing once warmed up, but cold starts are horrendously loud.

Ok..so, I leave my house at 6am to go to work. I think I am ok to increase the sound a bit and not be overly obnoxious when leaving for work since I live in a neighborhood with lots of modified pickups, but I think that cold start sound I keep hearing will be too much.

I also keep reading that n54 midpipes that have the cat will reduce the smell a lot after going catless on a n55. But will they also reduce the sound a little too?

houtan · 08-01-2017, 11:44 PM

Just install mhd once it's officially released and enable cold start delete feature.

bodega_cat · 08-02-2017, 04:15 AM

I don't plan on doing mhd so I was looking for other options

pepper135I · 08-02-2017, 04:36 AM

Quote:

Originally Posted by greenc51

I don't plan on doing mhd so I was looking for other options

It deff will quiet down a bit .

Jorgensen54 · 08-03-2017, 01:23 PM

Trade my N54 mids for your N55 mids

Pinoypowers · 08-03-2017, 10:09 PM

I have an N55 with catless DP and BMW PE and the cold startup is loud but only for about minute. If you have a stock muffler it should be a little quiter.

08-01-2017, 10:19 PM	#1
bodega_cat Lieutenant 155 Rep 438 Posts Drives: 2015 M4 Join Date: Dec 2015 Location: In the moutains iTrader: (1)	N55 and Catless Downpipe - Will N54 Midpipe Reduce Cold Start Sound? So I am looking and picking up a dp for my 2013 soon. I've been watching a bunch of vids and reading threads and all that. Everything I came across says the sound is amazing once warmed up, but cold starts are horrendously loud. Ok..so, I leave my house at 6am to go to work. I think I am ok to increase the sound a bit and not be overly obnoxious when leaving for work since I live in a neighborhood with lots of modified pickups, but I think that cold start sound I keep hearing will be too much. I also keep reading that n54 midpipes that have the cat will reduce the smell a lot after going catless on a n55. But will they also reduce the sound a little too?
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08-01-2017, 11:44 PM	#2
houtan Colonel 733 Rep 2,473 Posts Drives: 2011 135i Join Date: Jun 2013 Location: socal iTrader: (17) Garage List 2011 135i [9.83]	Just install mhd once it's officially released and enable cold start delete feature. __________________ 2011 LMB 135i DCT Pure Turbos Stage 3 (PS3) dyno results for N55 Pure Turbos N55 Stage 2 (PS2) results, reviews, install tips and docs, pictures, etc
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08-02-2017, 04:15 AM	#3
bodega_cat Lieutenant 155 Rep 438 Posts Drives: 2015 M4 Join Date: Dec 2015 Location: In the moutains iTrader: (1)	I don't plan on doing mhd so I was looking for other options
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08-03-2017, 01:23 PM	#5
Jorgensen54 Lieutenant 104 Rep 486 Posts Drives: 2008 AW/AG 135i 6MT Join Date: Dec 2016 Location: Seattle iTrader: (1)	Trade my N54 mids for your N55 mids __________________
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08-03-2017, 10:09 PM	#6
Pinoypowers Private 12 Rep 56 Posts Drives: 2013 135i Join Date: Jun 2017 Location: Diamond Bar, California iTrader: (0)	I have an N55 with catless DP and BMW PE and the cold startup is loud but only for about minute. If you have a stock muffler it should be a little quiter.
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