Is a rack and pinion legal for TSL? The rules I find here say: I would assume that means that a rack is illegal. I already have the rack on my car because it's legal for TSM, but I want to keep the car legal for as many classes possible. My only other question is about the rearend. The rules say: I bought 15x10 4.5" backspacing wheels and built my rearend to fit. I'm not sure if it's within the 1" allowance or not becuase I don't know what the width is on a stock rear. What's the purpose of this rule?