(ed. comment: This car sounds awesome.)

Performance:

Borla catback with flex pipe conversion (purchased from ebay)

SHOshop high flow airbox

SHOshop UDP

Suspension/Brakes:

26 mm Rear sway bar purchased from Marcus's SHO junkyard ;)

Appearance:

Custom gold trim pin stripe

Plastic V8 badge replaced with gold circular V8 badges

Misc:

K&N oil filters (adds one additional quart)