lets play a game

[angrychickens]

the name of the game, determine the cause of that noise.
it only happens while accelerating.
and it dies down when the car warms up.
sounds like it may be coming from the catalitic converter, this is hersay.
the sounds goes clack clack clack clack. speed up when i accelerate and slows down when i do. at higher speeds it gets so quick and higher pitched it is hard to hear. when the car is cold the sounds is clearly heard with the window down.
my car is a s14 96 this noise has been going on since i had no mods to my car and has become louder over time. im thinking my muffler is fucked up but want a second and third and sixth oppinion and a few burns along the way enjoy.