Good question bro, however for your info enjin + wiring sahaja pun dah antara 14 - 20k, the way u tanya macam nak complete M3.Standby bajet 50 to 70 K la.
M3 goods :-
Lining door 500
Lining Bumper 500
Bonet 2000
Bumper 3000
Suspension 7000
Rims 3000
Sideskirt 1000
ekzos 5000
LSD 3000
Long shaft 1500
rear axle ?
m3 brake 7000
spoiler GT 3000
sunroof 3000
vader seat 6000
gear knob 600
handbrake 600
pedal 300
carpet 500
door sill 600
door pin 200
rear vader seat 4000
fender 1000
air duct 200
all m3 under engine cover 1000
x-brace 900
anti roll bar 1800
strut bar rear and front 3000
stering 4000
engine wiring + engine (tak confirm elok 100%) 15000
those yang ada lagi nak tambah la???silakan