Hi everybody!!!

Im new here and already have a problem with my car. The thing is it makes a rattle when I accelerate. A mechanical rattle. The car is a 1998 GS300. At first it wasnt that strong, sounded like a small hole somewhere in the exhaust. Now it makes a louder rattle and a little bit when in runs on neutral. No lights are blinkin, everything works normal. Just a mechanical rattle. Can it be some plating or something under there doing the noise. Ill have it checked after new years eve. Just hope that you can tell me what to look for.
Oh and also, where is the best place to shop for lexus performance on line.

Thanks a lot guys.