Thats on my shopping list for my 650, which should make it untouchable, but whats this kit your thinking of making for your 330? I ain't no mechanic so you might have to talk in laymens terms. Lol. Wouldn't know where to even start about making my own kit. As for putting it on my 318, think i would rather upgrade the car to a 328 or M3 Evo and doing it to that. Think it might be wasted on a 1.8