On second though you should debadge your car and replace it with stickers
+5 HP for Type R
+5 HP for //M
+5 HP for LE
+5 HP for GTi
+5 for STI
+5 for GT
+5 for GLT
+10 torque for every one you can combine. I would try:
"//M 350GT STi Type R Gen X Rally Series Uber BMW LE"
(if you run out of room just start it again on the lower bumper)
Oh and .01g of grip if you out on black rims, +acceleration if you make the rims as big as possible. +5 bling if they spin and make sure they cost 2.5x what the car is worth for proper point acquirement. Then top the rims off with the cheapest tires you can find at pep boys, because you should spend the money elsewhere, like on more stickers!!!
-----lots of drag if you lower the car past speed bump limits, you'll 0-60 will drop like crazy though!!!
Also make sure to put "BMW Type Uber" across the front windshield so everyone knows your a bad ass just in case someone cannot hear the fart pipe you put on it.
Oh and limo tint is great, plus add a few fake gauges so people you get close enough to see through the limo tint might think you have N20.
And lastly put a spoiler on top of your wing, it will look like totally awesome dude. I would so buy that car!!!