'pop' during upshifts after installing catback
 

I just installed a high flow cat and RB duals and now get a pop or bark from the exhaust during spirited upshifts. Is this normal? It never happened before...at least I couldn't hear it with the stock setup.

Yep, normal

put a midpipe and look out for some flames. Be CAREFUL of fuelcut tho ;)

Back fire.

Totally normal with an unrestrictive exhaust. Get on it hard and let off and you will shoot a fireball, literally.

Raj

my HKS does the same on my FD.

scares the sheit load of people near me.