i have a 1985 4000s quatro with the 5 cyl.where can i find aftermarket motor stuff and body kits ?

 

For your cosmetics you can try here , www.tmtuning.com.

For your "aftermarket motor parts", im not sure if there is a site that sells bolt on parts for performance, but there is things you can do yourself. Word of advice, before you get heavy in bolting on performance parts, make sure you do a full scale tune up.
Air/fuel filter, wires, sparkplugs, dist. cap, rotor, fluids, oil, and anything more like tires, brakes, whatever is not 100%.

 

I'll second that and add that sometimes the best kit for an older model is debadging, and making it mint. I often look at older Audis, BMW's and Mercs and think of painting the chrome window trim to match the car, shave some stuff here and there and updating the lighting. Old 4ks look pretty nice in stock form, I would lower it with a good suspension kit (performance lower, not slammed...lol) maybe do a +1 upgrade for rims and whatever....I (given skys the limit budget) would go to a body shop and have them flare the fenders...nice

 

Try www.tap1.com. They have alot of performance parts.

 

still gets my vote for the best 4x4 Audi ever and that style wow its forever