Anyways i have a parts list here for u...hope it can help you out..

info from other forums...
Mitsubishi Lancer Evolution IV RS (CN9A)
Summary of tunes
N tune - best in everything but may drift a bit
A tune - best accel
B tune - best speed
C tune - cornering
D tune - stable
Engine/internals
A tune - should have 300PS
Other tunes unknown
Wheels
A tune - stock - average grip, average in rain, average start - all course
B tune - Enkei white 5-spoke - excellent grip, average in rain, good start
C tune - Enkei grey multispoke - good grip, good in rain, good start
D tune - Valdi Sport gold 6-spoke - avg grip, excellent in rain, bad start
no tune - Enkei white 6-spoke - excellent grip, good in rain, excellent start - all courses
Muffler
N tune - Mitsubishi single - avg accel, bad steer, good start, 1-2 good 3-5 avg - all courses
A tune - Initial D Hawk/Seiji type single pipe muffler - avg accel, avg steer, excellent start, 1-3 excellent 4 avg 5 bad - last 3 courses
B tune - HKS - good accel, good steer, good start, 1-4 good 5 avg - all courses
C tune - Fujitsubo - good accel, excellent steer, avg start, 1-3 avg 4 bad 5 good - first 3 courses
D tune - Bozz Speed dual muffler - excellent accel, excellent steer, good start, 1-3 good 4 excellent 5 avg - last 3 courses
Rear spoiler/wing
N tune - Mitsubishi - avg accel, avg steer, good in rain
A tune - Initial D lightened Evo IV spoiler - good accel, good steer, avg in rain
B tune - HKS GT wing - excellent accel, excellent steer, bad in rain, unstable at high speed, AVOID RAIN, great steering
C tune - Valdi Sport Evo V-type spoiler - good accel, good steer, excellent in rain, great in the rain, stable at high speed, good steering
D tune - Bozz Speed - excellent accel, good steer, avg in rain, not as light as B. very stable at high speed, OK in the rain
Front bumper
N tune - Mitsubishi - good accel, avg steer, stable
A tune - Mitsubishi - same as N
B tune - HKS - excellent accel, excellent steer, very unstable, super lightweight, get's "odd" at high speed, crap in rain
C tune - Valdi Sport - excellent accel, good steer, unstable, lightweight, sometimes gets strange at high speed, OK for rain
D tune - Bozz Speed (Evo IV bumper + additional spoiler lip) - avg accel, good steer, very stable, Great at high speed due to the extra down force, great in rain
Stickers
A tune - Monster Sport sticker - +1.5% accel
A tune - Initial D Emperor sticker - +1.5% accel
Subaru Impreza WRX STi GC8
Summary of tunes
A tune - considered having best accel and speed, but drifty
B tune - best top speed
C tune - best handling
Engine/internals
A tune - unknown
B tune - unknown
C tune - unknown
Wheels
A tune - Volk Racing TE37 (gold) - typical of VR wheels.....handles bad but fast
B tune - Volk Racing multispoke (gold)
C tune - Enkei multispoke (white)
Muffler
A tune - STi
B tune - Syms
C tune- Zero Sports
Rear spoiler
A tune - STi S201 large spoiler - stable
B tune - Syms (resembles a Skyline R32 spoiler)
C tune - Zero Sports (resembles a Skyline R33 spoiler)
Front bumper
A tune - STi WRC bumper - get the WRC look!!!!!
B tune - Syms
C tune - Zero Sports
Sideskirts
A tune - Subaru
B tune - Syms
C tune - Zero Sports
Rear bumper
A tune - Subaru
B tune - Syms
C tune - Zero Sports
Mirrors
A tune - Subaru
B tune - Subaru
C tune - Zero Sports aerodynamic mirrors - slight increase in top speed
Engine hood
A tune - STi rally roof air scoop
B tune - Syms
C tune - Zero Sports GT hood