If it was just wastegate rattle then they could have been adjusted for £150!
I had my turbos done on Wednesday, cost me half the amount quoted above.
Would the warranty have covered my turbos given the fact I have Catless Downpipes, FMIC, Meth kit, Diverter valves etc? I dont think so. If the clutch went tomorrow, I'm sure they would say the same story, the clutch isnt designed to have 50% more power/torque running through it.
If you want a warranty, keep the car standard or just tune only.
if you plan to go further, then pocket the cash.
"You have to Pay to Play"
2008 E90 335i LCI M Sport / Manual / Black / Red Leather / Avon ZZ5 / VMR710
Mods: JB4 G5 ISO / BMS Back End Flash / BMS DCI / AR Design DPs / ETS FMIC / Meth Injection / Spec Stage 2+ Clutch / BMS OCC / Cool Carbon Brake Pads / RB PCV Valve / Forge DVs / M3 Control Arms / Bilstein B4s / Eibach Pro Springs / Eisenmann Race
Wish List: LSD