I read the reviews on it and noticed on person said it does not fit well with a Helix dp. I have a Perrin dp witch should be the same diameter. Will I run into any leaking problems? Its 3" in diameter all the way thru right, not like the Borla Hush where the end goes to 2.5? I've noticed some peeps say its loud others say it's not. Any one got a sound clip?