i just installed my Greddy Evo2 about 2 weeks ago. i didn't have any problems with it until a week later. it all started when i was stopped at a red light and i hear this sound coming from underneath my car, like a loud vibration sound. first i thought that one of my hangers was loose, but when i went to check under the car i notice that the left flange of the exhaust was hitting my RSB. now this only happens when im at a stop (at idle). Has anyone came across this problem as well? if so, what did you do to fix it or any ideas to fix it. thanks

Pics

 

Progress RSB!!!

 

is getting the Progress RSB the only way?