M5 Exhaust flapper mod demonstrated

rocky · 12-24-2014, 09:25 PM

I have experimented with keeping the exhaust valves open on a new 2015 M5 w/ stock exhaust and I feel the difference is worth it to keep. Please view yourself and come to your own conclusion.

bronch · 12-24-2014, 10:07 PM

I know others will think otherwise and will want louder, but I think that sounds really good! I'm going from an E92 to this bohemoth because I need the space, but don't want to give up my youth quite yet, lol. So, did you wire your exhaust valves or get the Exhaustmeister thing?

rocky · 12-24-2014, 10:11 PM

Quote:

Originally Posted by bronch

I know others will think otherwise and will want louder, but I think that sounds really good! I'm going from an E92 to this bohemoth because I need the space, but don't want to give up my youth quite yet, lol. So, did you wire your exhaust valves or get the Exhaustmeister thing?

it took about five minutes to wire the valve open.....it normally stays closed until you get to about 3500 rpm and then opens for the brief time you drive in that rpm range. I was very impressed with the exhaust note and NO DRONE !!

bronch · 12-24-2014, 11:20 PM

Quote:

Originally Posted by rocky

it took about five minutes to wire the valve open.....it normally stays closed until you get to about 3500 rpm and then opens for the brief time you drive in that rpm range. I was very impressed with the exhaust note and NO DRONE !!

I like it and you may have saved just saved me $9K, so thank you

soooma · 12-24-2014, 11:31 PM

Delete Resonators for s little more fun
Still no drone

ARKONE · 12-25-2014, 12:16 AM

Man instead of Akrapovic exhaust, I can spend that $9k on getting Vorsteiner carbon fiber lip because they make the best one hands down (my opinion).

Anyone know if you get Carbon Fiber tips to just put over the M5 stock exhaust?

rocky · 12-25-2014, 01:53 AM

Quote:

Originally Posted by bronch

I like it and you may have saved just saved me $9K, so thank you

yup...unless u want to wake up the neighbors, this cheap mod not only sounds good but saves tons of money.... i get tons of compliments on the exhaust tone.

rocky · 12-25-2014, 01:54 AM

Quote:

Originally Posted by soooma

Delete Resonators for s little more fun
Still no drone

deleting the resonators?? how much louder will the exhaust be ? Is that what you did ? any sound bytes ?

HXS · 12-25-2014, 02:29 AM

What kind of wire did you use? Will heavy duty zip ties work also?

Sounds great... a lot better than when valves are closed for sure.

Boss330 · 12-25-2014, 10:45 AM

Quote:

Originally Posted by HXS

What kind of wire did you use? Will heavy duty zip ties work also?

Sounds great... a lot better than when valves are closed for sure.

Can you get heat resistant zip ties?

isugoo · 12-25-2014, 02:28 PM

Sounds great. with larger size tips, you will be set!

rocky · 12-25-2014, 05:52 PM

i used home depot size 12 (i think) stainless wire.....very simple

rocky · 12-25-2014, 05:53 PM

zip ties wont be strong enough

falsalem · 12-26-2014, 01:15 AM

I did mine with zip ties yesterday...will find out soon if they can resist the heat...I have catless Downpipes and stock exhaust...the sound is great in idle, revving, and low speed

RPiM5 · 12-26-2014, 07:10 AM

Quote:

Originally Posted by falsalem

I did mine with zip ties yesterday...will find out soon if they can resist the heat...I have catless Downpipes and stock exhaust...the sound is great in idle, revving, and low speed

I've still yet to hear the stock exhaust combined with catless downpipes. I'm so intrigued by that setup. No one has made any video of that yet.

falsalem · 12-26-2014, 09:09 AM

Quote:

Originally Posted by RPiM5

Quote:

Originally Posted by falsalem

I did mine with zip ties yesterday...will find out soon if they can resist the heat...I have catless Downpipes and stock exhaust...the sound is great in idle, revving, and low speed

I've still yet to hear the stock exhaust combined with catless downpipes. I'm so intrigued by that setup. No one has made any video of that yet.

Will post a vid tomorrow...

RPiM5 · 12-26-2014, 09:25 AM

Quote:

Originally Posted by falsalem

Quote:

Originally Posted by RPiM5

Quote:

Originally Posted by falsalem

I did mine with zip ties yesterday...will find out soon if they can resist the heat...I have catless Downpipes and stock exhaust...the sound is great in idle, revving, and low speed

I've still yet to hear the stock exhaust combined with catless downpipes. I'm so intrigued by that setup. No one has made any video of that yet.

Will post a vid tomorrow...

Sweet!

JPMD · 12-26-2014, 10:25 AM

Quote:

Originally Posted by RPiM5

Quote:

Originally Posted by falsalem

Quote:

Originally Posted by RPiM5

Quote:

Originally Posted by falsalem

I did mine with zip ties yesterday...will find out soon if they can resist the heat...I have catless Downpipes and stock exhaust...the sound is great in idle, revving, and low speed

I've still yet to hear the stock exhaust combined with catless downpipes. I'm so intrigued by that setup. No one has made any video of that yet.

Will post a vid tomorrow...

Sweet!

Thanks for posting this video. The one I posted exhaustmeister and Noelle 400 cell DPs with comp pkg. exhaust was not that good and did not get a great response.

Keeping the valves open IMO really helps the exhaust note for these vehicles as so much of our driving is stop and go and so much of the vehicles life is spent at these lower RPMs.

The after market exhausts like E Race, Akra etc I'm sure are better but also very pricey. I chose to put the $$ toward the DPs for both better sound quality and extra HP

falsalem · 12-27-2014, 04:22 AM

Quote:

Originally Posted by RPiM5

Sweet!

So this is what it sounds like with OEM Exhaust (Flaps held open with zip ties) and Catless Downpipes (Gintani)...I like it so far...Will upload videos of some drive-bys later this week...

falsalem · 12-27-2014, 06:21 AM

I just noticed that the zip ties had come loose before recording the video. I'll try keeping the valves open and record another video later this week.

boots · 12-27-2014, 08:52 AM

Sounds good bro. I like this. The one diff I can tell is there is lil to no turbo whine compared to our aftermarket exhaust. Still sounds mean

Mscarpa · 12-27-2014, 12:16 PM

Gents - I had my exhaust valves tied open earlier in the summer and the extra sound is just about right. Sounds a bit more aggressive. Just used some medium grade wire and it has been solid. It is worthwhile.

12-24-2014, 09:25 PM	#1
rocky Private First Class 41 Rep 165 Posts Drives: 2015 M5 Join Date: Sep 2014 Location: Southern California iTrader: (0)	M5 Exhaust flapper mod demonstrated I have experimented with keeping the exhaust valves open on a new 2015 M5 w/ stock exhaust and I feel the difference is worth it to keep. Please view yourself and come to your own conclusion.
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12-24-2014, 10:07 PM	#2
bronch Waiting for the sun 66 Rep 704 Posts Drives: 2018 M240ix Join Date: Oct 2006 Location: Tacoma, WA iTrader: (0)	I know others will think otherwise and will want louder, but I think that sounds really good! I'm going from an E92 to this bohemoth because I need the space, but don't want to give up my youth quite yet, lol. So, did you wire your exhaust valves or get the Exhaustmeister thing? __________________ 2012 E92 M3- Miss her. 2015 F10 M5- Land yacht, but miss her too! 2016 991.1 GT3- Woohoo! 2018 M240ix- Daily driver. Still Woohoo!
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12-24-2014, 11:31 PM	#5
soooma ///MD 1377 Rep 3,998 Posts Drives: M5 F90 Join Date: Apr 2013 Location: NC iTrader: (1)	Delete Resonators for s little more fun Still no drone
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12-25-2014, 12:16 AM	#6
ARKONE Lieutenant 59 Rep 513 Posts Drives: '11 458; '16 Escalade; '12 Z4 Join Date: May 2013 Location: United States iTrader: (0)	Man instead of Akrapovic exhaust, I can spend that $9k on getting Vorsteiner carbon fiber lip because they make the best one hands down (my opinion). Anyone know if you get Carbon Fiber tips to just put over the M5 stock exhaust? __________________ 2018 Lamborghini Huracan Performante 2012 Ducati Panigale 1199 S 2019 Ducati Panigale V4R
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12-25-2014, 02:29 AM	#9
HXS Licensed Drug Dealer 742 Rep 2,269 Posts Drives: F10 M5 Join Date: Oct 2010 Location: SoCal iTrader: (7)	What kind of wire did you use? Will heavy duty zip ties work also? Sounds great... a lot better than when valves are closed for sure.
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12-25-2014, 02:28 PM	#11
isugoo Major General 247 Rep 6,125 Posts Drives: 991.2 GTS Join Date: Feb 2008 Location: Irvine, CA iTrader: (73)	Sounds great. with larger size tips, you will be set! __________________ PAST: F80 M3 ZCP \| 911.1 C2S \| F10 M5 ZCP \| E70 X5M \| E90 M3 \| E46 M3 \| E36 M3
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12-25-2014, 05:52 PM	#12
rocky Private First Class 41 Rep 165 Posts Drives: 2015 M5 Join Date: Sep 2014 Location: Southern California iTrader: (0)	i used home depot size 12 (i think) stainless wire.....very simple
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12-25-2014, 05:53 PM	#13
rocky Private First Class 41 Rep 165 Posts Drives: 2015 M5 Join Date: Sep 2014 Location: Southern California iTrader: (0)	zip ties wont be strong enough
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12-26-2014, 01:15 AM	#14
falsalem Private First Class 14 Rep 110 Posts Drives: 2013 F10 M5 Alpine White Join Date: Jun 2014 Location: Kuwait iTrader: (0)	I did mine with zip ties yesterday...will find out soon if they can resist the heat...I have catless Downpipes and stock exhaust...the sound is great in idle, revving, and low speed
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12-27-2014, 06:21 AM	#20
falsalem Private First Class 14 Rep 110 Posts Drives: 2013 F10 M5 Alpine White Join Date: Jun 2014 Location: Kuwait iTrader: (0)	I just noticed that the zip ties had come loose before recording the video. I'll try keeping the valves open and record another video later this week. Last edited by falsalem; 12-27-2014 at 06:36 AM..
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12-27-2014, 08:52 AM	#21
boots Curve Thrasher 623 Rep 3,773 Posts Drives: 2013 Bmw m5..White/Blk. Join Date: Nov 2012 Location: Cypress Tx iTrader: (0)	Sounds good bro. I like this. The one diff I can tell is there is lil to no turbo whine compared to our aftermarket exhaust. Still sounds mean
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12-27-2014, 12:16 PM	#22
Mscarpa Private First Class 10 Rep 147 Posts Drives: 2014 M5 Black on black! Join Date: Feb 2014 Location: CT iTrader: (0)	Gents - I had my exhaust valves tied open earlier in the summer and the extra sound is just about right. Sounds a bit more aggressive. Just used some medium grade wire and it has been solid. It is worthwhile.
	Appreciate 0 Quote