iaknown's Exhaust System Review

PORTMOODY · 01-25-2019, 11:21 PM

do you need a new gasket from dpf to the exhaust? I have this exhaust but yet to install it. I can't find many clips of it with dpf delete either. Any drone?

dmanb2b · 01-26-2019, 05:18 PM

Quote:

Originally Posted by PORTMOODY

do you need a new gasket from dpf to the exhaust? I have this exhaust but yet to install it. I can't find many clips of it with dpf delete either. Any drone?

exhaust usually comes with gasket, but yes, need gasket from downpipe to midpipe. Aarod has vibrant 3" for few bucks if you need one

PORTMOODY · 01-26-2019, 07:18 PM

Quote:

Originally Posted by dmanb2b

exhaust usually comes with gasket, but yes, need gasket from downpipe to midpipe. Aarod has vibrant 3" for few bucks if you need one

Thanks. I will pick up a couple vibrant 3" gaskets before I install.

dmanb2b · 01-26-2019, 08:07 PM

Quote:

Originally Posted by PORTMOODY

Thanks. I will pick up a couple vibrant 3" gaskets before I install.

You should only need one, but good to have spare

PORTMOODY · 01-26-2019, 08:54 PM

Quote:

Originally Posted by dmanb2b

You should only need one, but good to have spare

Thanks. Car is new to me. I bought the exhaust brand new from someone who never installed it and I am really familiar with the n52 but not the m57. I know the dpf is one pipe, I should have put 2 and 2 together.

Mach.81 · 02-18-2019, 09:48 PM

Has anyone run this exhaust and seen real numbers compared to a stock gutted SCR with factory mufflers?

Is there any hp/tq gains using this full system?

RL18 · 02-19-2019, 07:51 AM

Quote:

Originally Posted by Mach.81

Has anyone run this exhaust and seen real numbers compared to a stock gutted SCR with factory mufflers?

Is there any hp/tq gains using this full system?

I don't have the atm exhaust, but you will probably see better performance from the atm vs gutted. I ran gutted for a bit and it seems like a gutted scr creates some undesirable turbulence since it's just a massive can, plus the rear mufflers also open up to a massive can. I feel like my custom exhaust gave my car some more mid range and top end power but probably placebo effect. The noise is better though which I think is worth it lol

dmanb2b · 02-19-2019, 09:34 AM

Quote:

Originally Posted by Mach.81

Has anyone run this exhaust and seen real numbers compared to a stock gutted SCR with factory mufflers?

Is there any hp/tq gains using this full system?

Main benefits are weight reduction and being able to keep your stock exhaust if you ever need to convert back or even swap between mufflers and no mufflers. I have had mine for 2 yrs now and love it.

Mach.81 · 02-19-2019, 01:41 PM

Put the order in today!

Cheers

Nadir Point · 02-20-2019, 11:26 AM

I got the IAKnown exhaust along with with a tune/delete a couple years ago and couldn't be happier with it. The note is a nice, deep but no-too-loud rumble that crescendos to an omious shriek at WOT. It took a little fiddling to get it hung just right, but it's been great ever since.

ki_soarer · 02-20-2019, 04:59 PM

dmanb2b · 02-21-2019, 11:58 AM

Quote:

Originally Posted by ki_soarer

First post in thread has a link to review with pictures. The exhaust can also be purchased and viewed at atmspeedshop.com

BlueHen335d · 02-21-2019, 12:55 PM

I've had ATM (Iaknown) turbo-back since October 2018 and absolutely love it. At first I had the mufflers, but switched the mufflers out for straight sections last month for some extra grunt. The resonator built into the section after the DP eliminates any drone, and with the mufflers now gone, it makes a glorious sound under WOT, especially from 3,500-4,500 rpm. Puts a poop-eating grin on my face every time.

ki_soarer · 02-22-2019, 02:56 PM

I have seen the pics in this thread and on their site. I just want more because it's beautiful. Maybe we can get some sound clips of the muffler version vs straight pipe version? I plan to get the mufflers since it's my DD, but @BlueHen335d makes me reconsider.

BlueHen335d · 02-24-2019, 01:53 PM

Quote:

Originally Posted by ki_soarer

I have seen the pics in this thread and on their site. I just want more because it's beautiful. Maybe we can get some sound clips of the muffler version vs straight pipe version? I plan to get the mufflers since it's my DD, but @BlueHen335d makes me reconsider.

Are you anywhere near Kent Island or New Carrollton Metro station (the two places I park on the way to my job in DC)? I'd be glad to give you an in-person sound clip.

ki_soarer · 02-24-2019, 03:12 PM

Quote:

Originally Posted by BlueHen335d

Are you anywhere near Kent Island or New Carrollton Metro station (the two places I park on the way to my job in DC)? I'd be glad to give you an in-person sound clip.

Funny you should ask... that's what the KI stands for in my screen name. PM on the way!

BlueHen335d · 02-24-2019, 05:55 PM

Quote:

Originally Posted by ki_soarer

Funny you should ask... that's what the KI stands for in my screen name. PM on the way!

Sheesh, how did I miss that?

SouthDiesel190 · 02-25-2019, 06:34 AM

Quote:

Originally Posted by ki_soarer

I have seen the pics in this thread and on their site. I just want more because it's beautiful. Maybe we can get some sound clips of the muffler version vs straight pipe version? I plan to get the mufflers since it's my DD, but @BlueHen335d makes me reconsider.

let us know what you end up going with and if it's not too much trouble load some sound clips!

ki_soarer · 02-25-2019, 08:49 AM

Quote:

Originally Posted by SouthDiesel190

let us know what you end up going with and if it's not too much trouble load some sound clips!

I will for sure. The only problem is I’m still a ways off from ordering for now. Got a baby on the way and trying to get the rest of the car sorted before the deletes.

Chrisk530 · 08-21-2019, 01:17 AM

Hi
New here, tuning and installing exhaust on my 335d.
OP Gary
Does this exhaust clear all the factory underbody panels ?
Thanks

f00dstamps · 08-22-2019, 09:46 AM

Quote:

Originally Posted by Chrisk530

Hi
New here, tuning and installing exhaust on my 335d.
OP Gary
Does this exhaust clear all the factory underbody panels ?
Thanks

There is a brace near the middle of the car that I ended up taking off because the exhaust was rattling against it. Make sure you spend some extra time aligning the exhaust tips in their openings while you are tightening down the exhaust clamps. Mine are not centered and they rattle against the rear bumper. I have loosened the clamps, centered the tips, and tightened the clamps but they eventually work their way towards the outside and rattle again.

spikarooni · 11-05-2020, 08:45 PM

Hi,

Where can I source a new exhaust kit for my deleted 335d?

I was not able to private message Iaknown?

Thanks

Patrick

01-25-2019, 11:21 PM	#45
PORTMOODY Captain 141 Rep 635 Posts Drives: Coal Roller Join Date: Mar 2014 Location: Vancouver, BC iTrader: (1)	do you need a new gasket from dpf to the exhaust? I have this exhaust but yet to install it. I can't find many clips of it with dpf delete either. Any drone?
	Appreciate 0 Quote

02-18-2019, 09:48 PM	#50
Mach.81 New Member 1 Rep 14 Posts Drives: 2011 BMW 335d M Join Date: Feb 2019 Location: Ontario iTrader: (0)	Has anyone run this exhaust and seen real numbers compared to a stock gutted SCR with factory mufflers? Is there any hp/tq gains using this full system?
	Appreciate 0 Quote

02-19-2019, 01:41 PM	#53
Mach.81 New Member 1 Rep 14 Posts Drives: 2011 BMW 335d M Join Date: Feb 2019 Location: Ontario iTrader: (0)	Put the order in today! Cheers
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02-20-2019, 11:26 AM	#54
Nadir Point Lieutenant 103 Rep 579 Posts Drives: Diesel Join Date: Dec 2015 Location: CO iTrader: (0)	I got the IAKnown exhaust along with with a tune/delete a couple years ago and couldn't be happier with it. The note is a nice, deep but no-too-loud rumble that crescendos to an omious shriek at WOT. It took a little fiddling to get it hung just right, but it's been great ever since. Last edited by Nadir Point; 02-20-2019 at 05:16 PM..
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02-20-2019, 04:59 PM	#55
ki_soarer Second Lieutenant 129 Rep 264 Posts Drives: 2010 335D Join Date: May 2018 Location: MD iTrader: (1)
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02-21-2019, 12:55 PM	#57
BlueHen335d Enlisted Member 8 Rep 35 Posts Drives: 2011 335d Join Date: Jul 2018 Location: Milford, DE iTrader: (0)	I've had ATM (Iaknown) turbo-back since October 2018 and absolutely love it. At first I had the mufflers, but switched the mufflers out for straight sections last month for some extra grunt. The resonator built into the section after the DP eliminates any drone, and with the mufflers now gone, it makes a glorious sound under WOT, especially from 3,500-4,500 rpm. Puts a poop-eating grin on my face every time. __________________ JR 2.8; Sutphin trans tune; ATM intake, IC, DP, & straight pipes; Fluidampr HB; AARod race pipe; swirl flap delete; Bilstein B12 Pro-kit, M3 control arms
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02-22-2019, 02:56 PM	#58
ki_soarer Second Lieutenant 129 Rep 264 Posts Drives: 2010 335D Join Date: May 2018 Location: MD iTrader: (1)	I have seen the pics in this thread and on their site. I just want more because it's beautiful. Maybe we can get some sound clips of the muffler version vs straight pipe version? I plan to get the mufflers since it's my DD, but @BlueHen335d makes me reconsider.
	Appreciate 0 Quote

08-21-2019, 01:17 AM	#64
Chrisk530 Registered 0 Rep 4 Posts Drives: 2011 BMW 335d Join Date: Aug 2019 Location: Oregon iTrader: (0)	Hi New here, tuning and installing exhaust on my 335d. OP Gary Does this exhaust clear all the factory underbody panels ? Thanks
	Appreciate 0 Quote

11-05-2020, 08:45 PM	#66
spikarooni Spikarooni 0 Rep 7 Posts Drives: 2009 335d Join Date: Nov 2020 Location: Silverdale, WA iTrader: (0)	Newbie to the 335d Hi, Where can I source a new exhaust kit for my deleted 335d? I was not able to private message Iaknown? Thanks Patrick __________________ Patrick Herbig
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