hi, I have a TRD exhaust (California Spec). The exhaust system hasthe main muffler and the "little mufler" on the back just right before the tip. I think it is called a resonator or silencer (not really sure). Anyways, have anyone tried to remove the little mufler from the back? I am planning to remove the little muffler and make it to a straight pipe. Will there be any drastic change in the sound of the exhaust? and is the little muffler really needed? (ie. for smog). thanks.....