getting drag out of the car is expensive and becomes border line to definetly illegal. I have seen it all first hand. The brakes, gears and bearings are key. For the average racer racing on a budget keep it in focus. Direct your budget year to year with weight in mind. Yes the wheels are weight saving, the new brakes are too. Between wheels and brakes you can deduct 40 plus pounds. Cut your rotors and drums to near minimum. Spooled gears are a plus, especially if you run one track. Keep the rear square, good bearing grease. These are key items to a free car with less rotating weight. Maintaining the car is so important, just keep it clean, clean everything and never power wash it. I could go on and on.