Sect 2 is most responsible for rasp. You can do an SS/RE/SGT x pipe and a 2.5" muffler like SS/scza/dinan and pretty much kill it even without res/cats in sect 1. plus stock sect 1 does have 1 res.
Unres SS dual pipe 2.5" sect 2 with 2.5" SCZA also killed my rasp with catless/unres sect 1
Unres SS dual pipe 2.5" sect 2 with 2.5" SCZA also killed my rasp with catless/unres sect 1
Comment