I had my M11 380 uprated to a 405 last week.although some companies said it will go up to 460 BHP I opted for the genuine ■■■■■■■ ECU re-map along with a top end set and a boost sensor it pulls quiet a bit better but not how it should so I had the intercooler pressure tested whilst still in the chassis. Although no leaks could be heard, it wouldn’t hold the 1 bar pressure put into it so i’m going to get it tested in water before I throw away £345 on a re-con intercooler. Oh the joys of motoring!
i know where you’ll get a seconhand one thats known to be ok, if thats any good?
Cheers. Taking it to be tested next Fri so will let you know next weekend.