: : I have a 1981 320i with 83,000 miles. It is the cleanest one I've ever seen(except for restored ones). Should I give up my dream of making it fast or is it actually possible with this old 4 banger. I need suggestions. Turbo's? Headers? slip differential? you tell me....are they worth it or should I save my money. and NO, dont say buy a different car if you want to go fast I like this one! : Sorry Joe ......I think you should give up your dream, theres nothing you can do to that old p.o.s. and i highly doubt that it is the cleanest one youve ever seen...