Test pipes< which brand???

zyal8r

Hi guys, i have a 2016 370z. I had originally bought the HKS HI PO CBE and wasnt satisfied with the sound it made so i chopped the mufflers. The car now sounds amazing. But its time i want just a little more. My questions are 1) will non resonated test pipes increase backfire and crackling noise? (i like that) 2) will non resonated test pipes cause an ungodly amount of drone? (to the point where driving 15 min anywhere gives you a headache) 3) will non resonated test pipes increase raspiness? 4) should i look into custom test pipes or a brand, if brand which one?