Who on earth does twin turbos for an M5 (apart from me and soft toys
) ???
£1000 barely buys a stock BMW exhaust, so I suspect that custom made headers for the turbo plumbing would be around this.
mmm.... "can`t reliably say what it is."
Well, if I had literally a one-off supercar like this purports to be, then I`d damn well remember what I did to it, no matter how many Vodkas!!
Well;
Two turbos take a 211 BHP 535i and spawn a fire-snorting monster like the 360 BHP Alpina B10 BiTurbo.
Two turbos on this car turn a 340 BHP 1995 3.8 M5 into err... a 386 BHP M5.
Sounds like your friend likes a drink, and definately was given a bottle or two by the turbo salesman to get him to sign up for this "conversion".
Two Turbos. 23hp each. Doh !! LOL.
178,000? Miles?
Better start saving for the timing chain maintenance...
Ivan.