okay but i didnt hit ne thing...so could the resonator be defective? the guys that sold me the exhaust asked me are u sure its not ur cat? cuz im thinking how will i be able to know if the noise is coming from my cat? and i am pretty sure it coming from the resonator...but they would need to ship the exhaust back to greddy either in cali or jersey and i will be stuck with no exhaust system in my car for the time being lol....ugh