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6 Series DIY
6 Series Do It Yourself (DIY) forum.

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  #1  
Old 08-17-2011, 10:32 AM
Mfetischist Mfetischist is offline
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BMW 645i Cut up my stock mufflers, can anybody help me

Hi @ all

I wanna modify my stock mufflers, but i dont know where i should cut them up and i dont know what i have to do then.
Have anybody pics who modify the mufflers or can help about that thread. Thanks a lot!
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  #2  
Old 08-17-2011, 10:57 AM
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Yorgi Yorgi is online now
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Check out these two threads. There are some pics and videos in each.

Exhaust Thread

Resonator Thread

Your 540i sounds awesome BTW. Like the 520 badge on the back.
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  #3  
Old 08-17-2011, 11:29 AM
Mfetischist Mfetischist is offline
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Thanks for your post. But i searching for anybody, who cut up the stock mufflers, cut out the parts inside and take inside a perforated pipe that it looks like a magnaflow inside.

Cause in germany the laws are very strictly, thats the reason that i want, that the mufflers are looking stock from behind and under the car.
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  #4  
Old 08-18-2011, 09:09 AM
Mfetischist Mfetischist is offline
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Anybody knows, what is he doing on his exhaust, here in that video. Cause it calls standard muffler?

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  #5  
Old 08-18-2011, 01:06 PM
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If that is a standard OEM exhaust in the video he has removed the resonators.
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  #6  
Old 10-28-2011, 05:09 PM
stevelee203 stevelee203 is offline
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Yorgi i have question
oem muffler pipe size 2.25 right
what happen if i use 2.5 pip?
i'm try to do same set up as White Drop top
remove all 3 resonator and put x-pip in front where 2 resonator locat
and buy 2 offset magnaflow muffler (part#11235) and may be tip Part#35159
but if i use 2.5 size pip what's the different? do you know by any chance?
thanks
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  #7  
Old 12-20-2011, 03:20 PM
stevelee203 stevelee203 is offline
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up date on muffler system

Hello all

how are you?
i want to share my muffler change update

1st i remove front 2 round can resonator
-sound = not much different on sound little bit louder but better gas response and yes car got little bit more faster
Gas if 17 city all stock feels like 13~14 per gallan.
cost $ 30 to do it
i attach 3photos for 1st 2 front resonator remove

after 2 weeks later

2nd i remove center box resonator
so now i'm at 2front round can resonator remove and center box resonator remove
sound= much louder with kind of deep tone
power= since there is no back pressure loss power on low but high rpm very fast
gas= gas goes much faster like 10miles per gallan trust me on this you will see gas goes really really fast down.
cost =$ 30
2photos attach

note: after i remove center box resonator car shakes and little bit of buk buk buk sound
since there is no back pressure.
also when center black plate is back on.
one side of pip touch so i had very loud metal touching sound when i drive.
i have to fits right away
2nd center box resonator photos attach

And today 12/20/11
i order from summit Cherry Bomb 429834 - Cherry Bomb Universal X-Pipes (with shipping L.A $45.90)

i remove 1st and 2nd location attach pipes( after patch pipe look ugly so cut all out as you can see on photos)

3rd. i put cherry bomb x-pipe on front 2 round resonator was and
make new pipe Straight out
sound= almost F1 sound kind of high tone (i love it)
power= now i have back pressure now so more power in low and high
gas= i didn't test yet but i'm sure since i got back pressure back froom x-pip hope to save me some gas mileage
car response so much faster also no shaking on car and no mor buk buk buk sound ^^
cost= $45

total cost to muffler systm as is now =$30+30+45+45.90= $150.90

i might keep my muffler systm like this for few weeks and i might upgarde final with magnaflow muffler with dual tip

3rd set up photos attach

i want to attach sound but how do i attach video?
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[/SIGPIC][/SIGPIC]2006 BMW 650I Convertible Black Saphire Metallic / Black
SMG
Premium Sound
Sport / Cold / Comfort Access
19" OEM
Logic 7 Premium
Sound HD Radio
Heads Up Display
Park Distance Control
K&N air filter
Aluminum Racing Pedals
6000k headlight upgrade
fog light upgarde

2010 MV AGUSTA F4 titanium/RED frame
2010 Audi Q5 S Line

Last edited by stevelee203; 12-20-2011 at 03:59 PM.
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  #8  
Old 12-20-2011, 04:00 PM
stevelee203 stevelee203 is offline
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so after all my 1st and 2nd set up if you go with like 3rd set up
you will save $60
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[/SIGPIC][/SIGPIC]2006 BMW 650I Convertible Black Saphire Metallic / Black
SMG
Premium Sound
Sport / Cold / Comfort Access
19" OEM
Logic 7 Premium
Sound HD Radio
Heads Up Display
Park Distance Control
K&N air filter
Aluminum Racing Pedals
6000k headlight upgrade
fog light upgarde

2010 MV AGUSTA F4 titanium/RED frame
2010 Audi Q5 S Line
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  #9  
Old 12-20-2011, 04:02 PM
stevelee203 stevelee203 is offline
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Mein Auto: 2006 BMW 650I CONV.
sound on youtube

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[/SIGPIC][/SIGPIC]2006 BMW 650I Convertible Black Saphire Metallic / Black
SMG
Premium Sound
Sport / Cold / Comfort Access
19" OEM
Logic 7 Premium
Sound HD Radio
Heads Up Display
Park Distance Control
K&N air filter
Aluminum Racing Pedals
6000k headlight upgrade
fog light upgarde

2010 MV AGUSTA F4 titanium/RED frame
2010 Audi Q5 S Line
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  #10  
Old 12-20-2011, 04:03 PM
stevelee203 stevelee203 is offline
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x-pip set up
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[/SIGPIC][/SIGPIC]2006 BMW 650I Convertible Black Saphire Metallic / Black
SMG
Premium Sound
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Logic 7 Premium
Sound HD Radio
Heads Up Display
Park Distance Control
K&N air filter
Aluminum Racing Pedals
6000k headlight upgrade
fog light upgarde

2010 MV AGUSTA F4 titanium/RED frame
2010 Audi Q5 S Line
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  #11  
Old 12-21-2011, 10:17 AM
stevelee203 stevelee203 is offline
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i love the new set up muffler
so much faster sound good gas respons much better
awesome
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[/SIGPIC][/SIGPIC]2006 BMW 650I Convertible Black Saphire Metallic / Black
SMG
Premium Sound
Sport / Cold / Comfort Access
19" OEM
Logic 7 Premium
Sound HD Radio
Heads Up Display
Park Distance Control
K&N air filter
Aluminum Racing Pedals
6000k headlight upgrade
fog light upgarde

2010 MV AGUSTA F4 titanium/RED frame
2010 Audi Q5 S Line
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  #12  
Old 04-09-2012, 10:20 PM
leon920802 leon920802 is offline
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Thanks Steve, it s really helpful.
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  #13  
Old 04-10-2012, 10:02 AM
stevelee203 stevelee203 is offline
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Quote:
Originally Posted by leon920802 View Post
Thanks Steve, it s really helpful.

any time

well,
i talk to Alex at muscle tuner shop i'm goin to remove the oem muffler first to see how is the sound 1st and if too i don't like the sound i'm going to add oem 2 can after x-pipe and see how the sound going to come out

well post video soon
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[/SIGPIC][/SIGPIC]2006 BMW 650I Convertible Black Saphire Metallic / Black
SMG
Premium Sound
Sport / Cold / Comfort Access
19" OEM
Logic 7 Premium
Sound HD Radio
Heads Up Display
Park Distance Control
K&N air filter
Aluminum Racing Pedals
6000k headlight upgrade
fog light upgarde

2010 MV AGUSTA F4 titanium/RED frame
2010 Audi Q5 S Line
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  #14  
Old 04-15-2012, 03:38 AM
Mattd7 Mattd7 is offline
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Damn sounds really good I just deleted 2 resonators and added a x pipe to my eisenmann race mufflers and still don't have sound like that nice job
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  #15  
Old 01-30-2013, 11:49 AM
MichaelMax MichaelMax is offline
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Mein Auto: 2007 BMW 650I
I have 07 650 and I'm doing the same thing to my car. Can you tell me what size of pipes you used ? 3 or 3.5 inch ?
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  #16  
Old 09-25-2013, 01:57 PM
slemmer slemmer is offline
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So with option #3. Did you get back your gas mileage with the x-pipe at the front and straight pipes for the back resonator delete? Thanks.
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  #17  
Old 09-27-2013, 05:59 AM
slemmer slemmer is offline
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OK, I took the next plunge and removed the boxed resonator after minimal difference with just the x-pipe replacing the twin front resonators. 1000x improvement in the tone. Going to leave stock mufflers in place for the time being as this is exactly what I'm looking for. If I keep my mufflers stock I'll just get me local shop to R/R the tips and change toa quad oval.
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