remove the precat for proper pops and bangs,its the only way to make it happen all the time,i ran a ktec cat back and decat for 8 months and it popped and cracked from time to time,sounded really nice (deep sound),i've now removed the precat as well and it bangs loud every gear change when your giving it some but it is a little more raspy from inside in my opinion,when cold the bangs are mental
What did you replace the precat with mate?