135i & K&N

evilstib · 09-13-2010, 10:16 PM

Anyone have the K&N drop in filter on their 135i?

How's it sound? I can get one locally for $100...Any sound increase?

Any other ideas?

I'd like a bit louder sound on the car. I've done the Dinan Stage 2 already. Sounds nice, but still a bit quiet.

I notice on most of the exhaust systems that you mostly hear 'engine' out the tail pipe and not 'exhaust' (I used to drive a civic...I know exhaust ;P )

Is this the turbos that silence it? I notice that downpipes increase the 'exhaust' noise a lot (cat delete), but I'll most likely void warranty (posts on turbo spool & boost creep..etc.)

How can I make that beautiful noise louder without any warranty problems?

J5isalive · 09-13-2010, 10:30 PM

You drove a civic so you know exhaust......

You won't notice much noise increase from the drop in, if you do a dual cone setup you will notice much more... As far as power increases, they will be minimal unless you tune for the increased air, or until you get to the power levels where the increased air will be beneficial.

As far as drop ins...they can be had for about 50-60 buck so shop around 100 is too much.

Yes a turbo is a silencer of sorts.... but please keep in mind you don't "hear exhaust"

The reason downpipes increase noise is because they delete the cat, yes this will void your warranty if you have a picky dealer.

Boxtyp3 · 09-13-2010, 11:56 PM

If you wanna go for sound, then get a DCI. Otherwise the stock airbox is more beneficial because of the air temp in the engine bay being sucked by DCI.

luv135i · 09-14-2010, 01:02 PM

yea u can get dci from BMS for 100. Dropin is less than 60 all day long

///M1 · 09-15-2010, 08:54 AM

No need to go with K&N for $100 (it is actually cheaper through Ebay). Get the BMW drop-in, which is same manufacturer as the Macht Schnell one, except costs much cheaper. Don't get your hopes up for more noise or whoosh as it is very slight, but still maintains the closed form airbox while increasing 'breathability'.

evilstib · 09-15-2010, 10:17 PM

Quote:

Originally Posted by maxnix

Here's a clue: Filters are to remove particles from the intake air stream!

Buying an air filter for its sound is like buying tires for their color.

Oh no! Don't tell us........

Agreed, filters are to remove particles from the air stream, but how much air they let in will make a noise difference. I've used K&N and there is a sound difference.

Thx for the smarty comment though

09-13-2010, 10:16 PM	#1
evilstib Bimmer Newbie 22 Rep 312 Posts Drives: CSM N54 Prem/Comf/Sound Join Date: Aug 2010 Location: Bear's Ass Canada! (Fort Mac) iTrader: (0)	135i & K&N Anyone have the K&N drop in filter on their 135i? How's it sound? I can get one locally for $100...Any sound increase? Any other ideas? I'd like a bit louder sound on the car. I've done the Dinan Stage 2 already. Sounds nice, but still a bit quiet. I notice on most of the exhaust systems that you mostly hear 'engine' out the tail pipe and not 'exhaust' (I used to drive a civic...I know exhaust ;P ) Is this the turbos that silence it? I notice that downpipes increase the 'exhaust' noise a lot (cat delete), but I'll most likely void warranty (posts on turbo spool & boost creep..etc.) How can I make that beautiful noise louder without any warranty problems?
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09-13-2010, 10:30 PM	#2
J5isalive Private First Class 49 Rep 132 Posts Drives: '20 M2C, '15 GT3 Join Date: Aug 2010 Location: Alpharetta Ga iTrader: (1)	You drove a civic so you know exhaust...... You won't notice much noise increase from the drop in, if you do a dual cone setup you will notice much more... As far as power increases, they will be minimal unless you tune for the increased air, or until you get to the power levels where the increased air will be beneficial. As far as drop ins...they can be had for about 50-60 buck so shop around 100 is too much. Yes a turbo is a silencer of sorts.... but please keep in mind you don't "hear exhaust" The reason downpipes increase noise is because they delete the cat, yes this will void your warranty if you have a picky dealer.
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09-13-2010, 11:56 PM	#3
Boxtyp3 Major 78 Rep 1,353 Posts Drives: 2015 F32 MG Join Date: Apr 2010 Location: SF Bay Area iTrader: (0) Garage List 2015 F32 435 [0.00] 2002 E46 cp [0.00] 2010 E82 135i [0.00] 2013 E92 335i [0.00]	If you wanna go for sound, then get a DCI. Otherwise the stock airbox is more beneficial because of the air temp in the engine bay being sucked by DCI.
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09-14-2010, 01:02 PM	#4
luv135i Major 60 Rep 1,073 Posts Drives: White Join Date: Nov 2009 Location: GA iTrader: (0)	yea u can get dci from BMS for 100. Dropin is less than 60 all day long
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09-15-2010, 08:54 AM	#5
///M1 Brigadier General 275 Rep 3,164 Posts Drives: Many Join Date: Feb 2009 Location: North of 7K RPM iTrader: (1) Garage List 2020 BMW M2 CS [0.00] 1994 Audi RS2 Avant [0.00] 2021 Audi RS6 Avant [0.00] 1988 BMW E30 M3 [0.00] 2011 BMW 1///M [0.00] 2017 BMW F80 M3 30 ... [0.00] 2018 Porsche 991.2 GT3 [0.00] 2015 Porsche Macan ... [0.00] 1998 Porsche 993 C4S [0.00] 1994 Lancia Delta I ... [0.00] 2008 Audi RS4 [0.00]	No need to go with K&N for $100 (it is actually cheaper through Ebay). Get the BMW drop-in, which is same manufacturer as the Macht Schnell one, except costs much cheaper. Don't get your hopes up for more noise or whoosh as it is very slight, but still maintains the closed form airbox while increasing 'breathability'. __________________ *2011 BMW E82 1///M: AW, all options; Renntech, Akrapovic, Forge, P3, RevoZ CF bits, many mods 1988 BMW E30 M3: Hennarot, S14, stock 2018 Porsche 991.2 GT3: PtS, CXX, LWBS, PCCB 1998 Porsche 993 C4S: Zenith Blue, last aircooled widebody, Bilstein PSS10, Fister II + Fabspeed exhaust 2008 Audi B7 RS 4*: Sprint Blue, Audi Exclusive Euro Bucket Interior, Premium+Titanium, many mods
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