
2002 Ford Focus SVT. Mine's not TOO evolved from stock, however the latest addition was an AEM short ram intake.
Other modifications were made as sh*t broke. Basically, once a working part stops working, I try to replace it with the higher end aftermarket part. These would be, so far:
A Fidanza lightweight aluminum flywheel
w/ Spec Stg 1 clutch (courtesy of my girlfriend's learning to drive manual on my old clutch)
A Bosch high output alternator (200amp)
The focus's "Screamin' Demon" ignition coil (which actually boosted my highway mpg in addition to a few hp.. go figure.)
Looking at that, it may seem like i've had to repair my focus a lot, and thats pretty much because i HAVE had to. Even so, I love everything about this car... and in all reality, i can't wait untill something else breaks so i can justify spending more money on it!