side effect ?

this recent i found that my engine tone getting louder , it's annoyed ... is it because of the catalyzer that i replaced with bullet ? hmm .... or the grounding cable that i install few weeks ago ? hmm ...........so annoyed ........ need help !!!!! the hot inazma pocket that ordered few days ago will be arrived today , hehe ... can't wait to try it .... please wait for my feed back !