Ok well my cars recently been having some trouble starting and it tends to backfire in the mornin a lil when i try to crank it, resulting in a ruined muffler that rattles now. Its a full apexi cat back. i was wondering if an hks or stillen rear section will bolt to the apexi b pipe. i would think so but i want to be sure, i want a greddy cat back pretty bad but if i can save some money by just doing the rear section then i will. Also wondering what the hks piece sounds like, im looking for like the loudness of the greddy...thanx for the help

--Dan