I also am having this same "metallic grind" sound coming from my car. I have the 2.5 and when I give it gas from a complete stop or moving really slow and give it gas in second i get this quick grind sound. It has been doing it for a long time and I do not notice any performance issues what so ever. What could it be? I would LOVE to figure it out! Its driving me crazy. What is this heatshield that FavMystique is talking about??

Midnight Red 95 Contour SE 5 speed, fully loaded. kkm M.A.F. adapter w/ K&N ru-3530, single Magnaflow muffler w/ no res. 2.25" custom catback exhaust, grafite painted stock 95 SE rims on bfgoodrich touring T/A's, 35% window tint around.