Ill nominate my '89 gtu.
Its been my daily driver since Nov '05
It has:
Racing Beat pre-silencer an mufflers.
Clutch Masters stage 2 clutch.
Advanced Auto air filter w/home made heat shielding.
Emissions stuff & vac lines, actuators rods & sleeves, AC stuff, all removed.
Home made t-stat neck.
Recently added a Tii hood w/vent scoop.
Also has s4 side mirrors, and different wheels up front.
Black tint on rear hatch.
Air/fuel ratio gauge inside.
Walmart subs for speakers.
198,+++ miles on the car.
Little over 50k miles on the engine.