i've got my eye on the modified super-charger pully and a new ECU for my XF SC. So, am i correct to assume that either of these enhancements will void my warrenty and/or violate my lease?
..and, how are these things installed? can any mechanic install the SC pully, or should I pay the dealer? Is the ECU "user installable", or another job for the dealer?

 

Brother..if was me, I would leave perfection alone..and it would probably mess up the engine warranty

 

randy do you have a link?