hey guys. i have a chance to pick up a full M5 exhaust cheap and was thinking about putting it on my 2005 545i. is this even possible? is there anyone on the board that has done it? how would it sound? also please let me know if anyone is interested because i may just resell it.

thanks!
colin

 

It will not fit. The right side of your car (passenger side) has a battery compartment which hinders the ability to put the M5 muffler there.

However, you can either get a custom muffler to fit in between the spare tire and battery box to fit there. That is what a lot of people did to make Quad tip exhaust.


Good luck.

 

hmmm, where is the battery box on the M5?

 

Where the spare tire is in our cars. M's dont have spare tires as they come with Run flats

 

Pm member Navin. He has this setup.

 

Cheap.. How many bucks ?
I would consider to get it: with some mods you might have a perfect (cheap) quad.

 

yeah, i would be willing to sell the whole setup on here for $300 plus shipping. do you think anyone would go for that? i'm not actually posting anything for sale yet, just trying to get a feel for whether or not i should buy it. if i get it i will post it in the classifieds section.

 

I have the driver side alone installed on my 545 with the center box resonator removed. The sound is just perfect and there is no loss at the low end like other mufflers. Also when RPI ran my car on the dyno last week the baseline was 254 whp so i did not lose or gain anything with this setup except for a perfect exhaust note.

 

cool! i have the RDSport single and i'm happy with it. i'm not sure if i am losing low end power or not but it is supposed to add a few HP. i have my resonators in, and it sounds good, but not like a real v8. i love the way the stock 645i sounds. why doesn't my car sound like that?

 

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