What if they threw in Samco hoses, poly mounts, drilled and slotted rotors and silicone vacuum hoses? Let's be realistic: ECU remap: cheap and doable (I would have done it, but I know not the support costs associated with it) Bigger turbo: great, but not justifiable for number of units Different trans or gearing: great, but not justifiable for number of units Better brakes: not cheap, but nice to have. (remember most consumers consider "four wheel disc with ABS" to be high performance in braking) Sways and performance tuned springs: nice, but most will bitch about ride quality Louder, free flowing exhaust: only car guys like loud exhaust, would alienate most of your potential buyers