Valve on stock mufflers

Subw00er · 04-16-2009, 01:52 PM

What would happen if I blew a single 3" hole in the rear or bottom of the stock mufflers and welded a remote controlled valve on there (Might have to use a bit of pipe for clearance). I just want a little more noise sometimes - not looking for HP.

I know there is packing material, and maybe chambers in there, but I've never seen a cross-section of one. It would be handy to have a cross-section of one to determine the ideal place to put the hole I guess - anyone have a pic of that by chance?

Could I harm anything doing this?

Anyone have a stock muffler for sale (ideally not chopped) so I dont have to cut up mine?

I was thinking of going with the $4000 KKS but for $300 in parts and a little welding, maybe I could just do it myself and get what I want - stock most of the time, and a little noise some of of the time. Even if I got the car 10-20% louder, I'd be happy.

J08M3 · 04-16-2009, 03:37 PM

You can buy my stock muffler... PM me a reasonable offer.

McLuVan · 04-16-2009, 10:50 PM

get "electronic cut outs"

Subw00er · 04-16-2009, 11:14 PM

ya, thats what I'm talking about doing.

rzm3 · 04-16-2009, 11:19 PM

Honestly, try removing the insulation in your trunk. Under covers there are a lot of material that absorbs sound. Also pull down your rear seats. This should make the exhaust sound more audible on the inside.

swamp2 · 04-17-2009, 12:16 AM

A nice cut out system done here.

tightie · 04-17-2009, 12:52 AM

Quote:

Originally Posted by rldzhao

Honestly, try removing the insulation in your trunk. Under covers there are a lot of material that absorbs sound. Also pull down your rear seats. This should make the exhaust sound more audible on the inside.

True.
I was driving Unique's M3 for about a week.. Stripped interior, I fell in love with the stock exhaust.

MrHarris · 04-17-2009, 05:22 AM

I got a stock e92 m3 muffler sitting my garage if you want it.

04-16-2009, 01:52 PM	#1
Subw00er Bates '08 Interlagos Launch 126 Rep 1,230 Posts Drives: 440i xGC, ZL1, JCW Join Date: Nov 2005 Location: NY iTrader: (2)	Valve on stock mufflers What would happen if I blew a single 3" hole in the rear or bottom of the stock mufflers and welded a remote controlled valve on there (Might have to use a bit of pipe for clearance). I just want a little more noise sometimes - not looking for HP. I know there is packing material, and maybe chambers in there, but I've never seen a cross-section of one. It would be handy to have a cross-section of one to determine the ideal place to put the hole I guess - anyone have a pic of that by chance? Could I harm anything doing this? Anyone have a stock muffler for sale (ideally not chopped) so I dont have to cut up mine? I was thinking of going with the $4000 KKS but for $300 in parts and a little welding, maybe I could just do it myself and get what I want - stock most of the time, and a little noise some of of the time. Even if I got the car 10-20% louder, I'd be happy. Last edited by Subw00er; 04-16-2009 at 03:08 PM..
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04-16-2009, 03:37 PM	#2
J08M3 Major General 286 Rep 6,007 Posts Drives: 2011 M3 COUPE Join Date: May 2008 Location: NEW YORK iTrader: (8)	You can buy my stock muffler... PM me a reasonable offer. __________________
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04-16-2009, 10:50 PM	#3
McLuVan Lieutenant General 304 Rep 13,114 Posts Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ iTrader: (1)	get "electronic cut outs"
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04-16-2009, 11:14 PM	#4
Subw00er Bates '08 Interlagos Launch 126 Rep 1,230 Posts Drives: 440i xGC, ZL1, JCW Join Date: Nov 2005 Location: NY iTrader: (2)	ya, thats what I'm talking about doing.
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04-16-2009, 11:19 PM	#5
rzm3 Moderator 673 Rep 4,737 Posts Drives: E92 M3 Join Date: Aug 2007 Location: USA iTrader: (18)	Honestly, try removing the insulation in your trunk. Under covers there are a lot of material that absorbs sound. Also pull down your rear seats. This should make the exhaust sound more audible on the inside.
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04-17-2009, 12:16 AM	#6
swamp2 Lieutenant General 611 Rep 10,407 Posts Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA iTrader: (3)	A nice cut out system done here.
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04-17-2009, 05:22 AM	#8
MrHarris yodog 197 Rep 5,025 Posts Drives: '86 Corolla Join Date: Jun 2007 Location: Diamond Bar, Ca iTrader: (5) Garage List 2009 BMW [10.00]	I got a stock e92 m3 muffler sitting my garage if you want it. __________________ 2009 E92 M3 \| Alpine White \| Black Extended \| Advan RS \| Turner Test Pipes \| Dinan Axle-Back \| OETuning \| Eibach Springs \| UUC SSK \| VRS Front Lip \| VRS Type I Diffuser \| Matte Black \| RPi Scoops \| MS Filter \| Yokohama AD08 \| F1 Pinnacle Special Thanks: Gintani \| OETuning \| eAs
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