rasp

So I finally got my LDPs installed and now around 2.5k rpm I get a loud rasp noise, I'm running a custom 2.5 exhaust from the LDPs back with x pipe and aftermarket "no big name" exhaust, do i need tune? Should I buy a nice name brand exhaust? Resonators? I'm lost at this moment, any suggestions...

So i just added isr test pipes to my q50 that also had a Stillen CBE. I was hoping that the exhaust system would eat up most of the rasp but that wasn’t the case. Still a noob to most mods but I was researching how I can add resonators to reduce the rasp. But could i add those to the exhaust...