Ok so finally getting around to making a thread for this thing. It's one car I've always kinda wanted to own, but when I got my 540i in May of last year I decided I HAD to get an E39 M5 by any means necessary. Fast forward to October and I pick this up. Owned by a cheap brown guy so if there was ever a list of "Common E39 M5 Problems" this one ticked every box. Mostly just niggling little interior issues and the like. It's a diamond in the rough.
All it had when I got it was some E60 M5 19's and AFE intakes which, now looking them up, retail for like 700USD.
The night I picked it up
That awesome plenum for the ITBs
After owning it for literally three days I removed the stock mufflers
And fabbed up something rad using some Invidia mufflers generously donated from a Subaru.
Nice rumble at idle and cruise. At WOT it sounds like it wants to tear your face off: