so i really like the HKS true dual Ti. i have heard it in person on an 06 with turbo xs test pipes and im happy with it. i have an 05 with APS non resonated test pipes. Am i gonna completely regret payin all that money for it sound wise or should i be fine. i have stock cats as well just in case but id like it to be louder like it would be with test pipes. Just read a few people say its not good on non res test pipes. BTW i have the 2.5 inch tp