Does it sound like your exhaust is blowing when your accelerating hard?
I have a full resonated Miltek system, turbo back.
I thought it was my downpipe blowing from the join to the turbo but i removed and refitted it today and it's perfect and as far as i can tell the rest of the system is perfect too, yet it still sound's slightly "raspy" (i use the term "raspy" lightly here) under hard acceleration.
Could it be because of the sports cat? or does any one have any other idea's?