I have just put on my hooker cat back system. I cannot belive how quiet it readly is. I had a 2 1/4 system with flowmasters on it before and it was not to loud, but you could hear the muffers. now the hooker is quiet over the flowmasters. Is this what it is suppose to be or do I have a problem. You can hear the hooker and when I give it gas it hears,but not to loud. Can someone tell me if that is normal and I have a test pipe and 2.5 dp. I can hear the turbo spool up everytime.