i have a vr6 motor, if i custom fabbed a ram air intake would i gain any horsepower? if not wats the best intake system to use?  

Ram air will work, but only at speeds in excess of 120mph. Actually, I think it's higher, but I don't remember what the article said at the moment. Ram air kits on any vehicle that is not a track/strip racer is primarily just for show. Some HP and torque gains can be had by porting & polishing your intake, using a free-flowing air filter (along the lines of a K&N), and using a polished/smooth intake tube.  

Are there any upgrades to the VR6 such as turbo or headers, supercharger that are recommended.