Nothing apart from serviceable parts.
I've added some 17" TSW Euracer's to my white 100nx, also a Le mans Scorpion Exhaust system with K&N replacement filter. I'm looking into lowering the ride with new shox, but don't know what to go for... I would like to find out how much it would be and where I could get the engine remapped?
I too have a Nissan 100NX, I put on a full Remus sports can with 16inch wheels & lowered springs, clifford sense & tell voice alarm, alpine ICE with 6xCerwin Vega speakers, with 2xCrossfire Amps & 2xAlpine Subwoofers in boot... you'll probably have to take the skins out of the wings if you have 17inch AND want to get it lowered... Spax is best, but very pricey, £500 fitted! For your information, it's not 1.6 injection, they only made 1.6 & 2.0 import - and both have carbs and not injectors... still quite nippy though for a box standard twin cam carb, on a Nissan Sunny chasis.
D in Manchester.
Sorry, I have to comment. From March 1993 all Nissan 100nx's had Multi-point fuel injection.