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E63 / E64 6 Series (2003 - 2013)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 05-30-2012, 07:08 PM
Howard.bias Howard.bias is offline
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BMW 6 series exhaust

I'm looking on buying a performance exhaust for my 645ci, what do you recommend, I was looking at magnaflow but I think
it will still be a little too quiet. Amy suggestions????


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  #2  
Old 05-30-2012, 07:58 PM
lc1412 lc1412 is offline
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Resonator removal and magnaflow will give you a nice aggressive sound
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  #3  
Old 05-30-2012, 08:59 PM
Howard.bias Howard.bias is offline
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I need to remove the resonator? Magnaflow? That what I was thinking but I didn't think I need to start removing stuff. I'll look into that. Thanks.

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  #4  
Old 05-30-2012, 10:43 PM
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Yorgi Yorgi is offline
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You don't have to remove the resonators (3 of them), but if you do it will greatly improve the sound (louder).

Since you mentioned that the Magnaflow might be a little too quiet, I think you will want to remove the resonators at the same time you do the exhaust.

Check out these two threads. There are some good sound clips there too.

removing resonator only

Resonators
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  #5  
Old 05-30-2012, 11:14 PM
Howard.bias Howard.bias is offline
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Ok where exactly are the resonators and if I remove them will that negatively affect my 645 in any way?

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  #6  
Old 05-30-2012, 11:39 PM
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Yorgi Yorgi is offline
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Originally Posted by Howard.bias View Post
Ok where exactly are the resonators and if I remove them will that negatively affect my 645 in any way?

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Read the threads in the links above, the subject is covered ad nauseum with pics and video.
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  #7  
Old 06-02-2012, 04:16 AM
leon920802 leon920802 is offline
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this is my 645ci with magnaflow and resonators removed, hope this can help u!
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  #8  
Old 06-02-2012, 04:21 AM
Howard.bias Howard.bias is offline
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Thanks a lot man I think I'll do that
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  #9  
Old 06-02-2012, 09:20 AM
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CJ645Bern CJ645Bern is offline
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Is removing the resonators illegal? Cuz I wanna try it lol

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  #10  
Old 06-02-2012, 02:03 PM
leon920802 leon920802 is offline
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yeah it s totally illegal and u still can pass the emission test
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  #11  
Old 06-02-2012, 02:31 PM
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CJ645Bern CJ645Bern is offline
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Originally Posted by leon920802 View Post
yeah it s totally illegal and u still can pass the emission test
That's the next thing I'm doing to my car then lmao

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  #12  
Old 06-02-2012, 06:11 PM
JPEG23 JPEG23 is offline
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It's not illegal in any state to remove resonators.

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  #13  
Old 06-02-2012, 06:51 PM
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CJ645Bern CJ645Bern is offline
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well actually, before i attempt to remove my resonator, i need to find out what it is! lol. can someone show me a pic?
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  #14  
Old 06-02-2012, 07:32 PM
JPEG23 JPEG23 is offline
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We already have too many posts on this subject and the aforementioned links provided by Yorgi explain all of this, please read those. Anyhow, it is not something you remove in your backyard, you need to take your car to an exhaust shop.

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  #15  
Old 06-04-2012, 07:45 PM
Howard.bias Howard.bias is offline
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Ok so I didn't remove the resonators. i removed the stock mufflers and put straight pipe from the resonators,....... it sound amazing, beefy and mean.
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  #16  
Old 06-30-2012, 02:20 AM
Howard.bias Howard.bias is offline
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Ok so as I said a while back, I kept my resonators and ran a straight pipe, it sounded good for a while. It's cool when you Rollin with your boys but when u are with a chick or going on a date, it's freakin annoying. So I'm going tomorrow morning to put some magnaflows on. Also I noticed that when you run a straight pipe, it slows your car down. It doesn't accelerate like it use to. I was told its cuz of the back pressure that the muffler provides. So I'm going with magnaflows and that will be that. I'll let the 6ers out there know how it goes
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  #17  
Old 06-30-2012, 07:06 AM
tampamark tampamark is offline
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Quote:
Originally Posted by Howard.bias View Post
Ok so as I said a while back, I kept my resonators and ran a straight pipe, it sounded good for a while. It's cool when you Rollin with your boys but when u are with a chick or going on a date, it's freakin annoying. So I'm going tomorrow morning to put some magnaflows on. Also I noticed that when you run a straight pipe, it slows your car down. It doesn't accelerate like it use to. I was told its cuz of the back pressure that the muffler provides. So I'm going with magnaflows and that will be that. I'll let the 6ers out there know how it goes


This sounds like the feedback I am used to on going with a straightpipe! I read your posts about that in the other thread and wondered to myself how you could stand it day-to-day. Lot's have liked the Magnaflow, should sound tough but not annoying.
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  #18  
Old 06-30-2012, 10:22 AM
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since you tolerated straight pipes for a month, the Magnaflows might sound a little quiet to you. If so, just go back and take out the two front resonators, and if it still isn't loud enough, then take out the third "box" resonator" and replace it with X-pipe. Best of luck in searching for the sound that best suits your tastes.
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