you forgot heatshield, and sometimes that heatshield...cant forget that one

 

i dont know what it's called, but its like a metal shield under the car, i think it protects from heat... i dunno, just check it

 

temprature deflector i think is the name, dude

 

You might want to check your heatshields. The welds can rust and cause it to rattle against metal. If that's the case, you'd probably just want to take the heat shield off, since it's not really necessary for the safety or operation of anything. Keep in touch!

 

took it off. and there is still a LOUD rattle..

 

that sucks

try the heatshield

 

Perhaps a bent hanger touching something? or broken ceramic in your cat?

 

i dont think its my cat... i would think it make sound at all rpm ranges

 

Harmonics arent the same at all ranges. Have someone sit in the car and rev it for you while you lay underneath

 

There is more than one heatshield. There are like a dozen of them. Look around. It might even be a heat shield.