What I've done wrong
 

Just thought I'd post a memoir of modification mistakes:


First, what I've done right:
VFE Supercharger
IPD Intake Plenum
Champion RG5 Wheels
PSS-10 Suspension
GT3 Seats
Misha GTM Insert with Carbon Fiber Wing
GiroDisk floating Slotted Rotors


What I shouldn't have done:


#1 Aasco lightweight flywheel (replaced with dual mass flywheel after a year or two of chatter. Only chattered at idle, probably because of the X51 cams, but it was driving me crazy)


#2 100 Cell Cats (these throw an occasional Check Engine Light for CAT Efficiency). Lots of extra power and great sound, but I should have used 200 cell Cats.


#3 Tubi Exhaust (sounded great till the 100 cell Cats blew out the baffles)


#4 M030 Suspension (thought it was great till I drove a friends PSS-9)


#5 GT3 Passenger Seat (ALL my passengers prefer the luxury seat. It looks a little silly to have the GT3 drivers seat and the heated x8 luxury passenger seat, but it's the only way to go)

You can never do wrong if the mod can be re-done. BTW...your car looks nice.