i just put the greddy evo 2 on my car a few days ago. install went good (other then rigging up the EVAP) and everything looks great.

i noticed however when i start my car after it sits for a while i hear a weird rattle from inside the car in the exhaust. my friends couldnt hear anything outside. after the engine funs for a minute or so it goes away. anyone got any ideas what this is. not really a big deal just drivin me nuts. i'd like to fix it if i can. thanks

 

If it's not orginating from the outside, it has to be an interior part. Take your car somewhere quiet and listen closely. You should be able to pin point the source with some luck.