Bought the L 6 months ago....in june did CAI ..6lb Pulley....SCT Tune...My JLP 4 inch drop shackles just arrived....have the FTVB being delivered this week....drive home today from work.....i hear a knocking..grinding kinda noise from the Supercharger.. :fm: :fm: ...anyone else have this problem with a new L with about 11000 miles on it????.....i am going to go back to the tuner....and remove the pulley and tune back to factory..grrrrrrrrrrrrrrrrrrrrr