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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Resonator removal and magnaflow will give you a nice aggressive sound

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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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

Ok where exactly are the resonators and if I remove them will that negatively affect my 645 in any way?

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Originally Posted by Howard.bias

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.

this is my 645ci with magnaflow and resonators removed, hope this can help u!

Thanks a lot man I think I'll do that

Is removing the resonators illegal? Cuz I wanna try it lol

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yeah it s totally illegal and u still can pass the emission test

Originally Posted by leon920802

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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It's not illegal in any state to remove resonators.

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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?

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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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.

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

Originally Posted by Howard.bias

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.

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.