I plan to continue decreasing the weight of my car by replacing stock parts that need replacing with lighter aftermarket pieces. For sure I'll do a 20 lb or so battery in a few years. Next will probably be lighter brake rotors. If I ever get any hood or trunk damage for sure I'll go to a CF replacement.
The one part I want that will be very unlikely to ever be needed to replace a worn stock part is I want a CF sunroof panel to replace the glass. I'm broke now so I don't plan any mods anytime soon.
Injen, RR OCC, MadDad Whisper, donut spare, 19x8.5et43fr 19x9.5et45r Volk LE37's, rear fenders rolled/pulled, Nitto 555 225/35fr PSS 255/30r, KW V1's, AR coated catless dps, Cross strutbar, CF grills and license plate holder, rearseat removal, iCarbon diffuser and front lip, ETS black anodized FMIC, M3 control arms, Quaife, ER chargepipe, ForgeDV's, Topspeed Custom Tune, V3sims, Braille, Andrey_GTA rear hub mod.