I would say wheels... I know, mine are aftermarket too, but if you want to cheap out, the original steel rims are good enough. The weight savings are negligible, for the average joe. Those big gulps and other junk in the car aren’t doing the car any favors in the weight category anyway. I am not saying you should buy cheap aftermarket wheels... Those made with questionable metals are actually a way more dangerous than the original steelies...