About a month ago I had a local shop install a Super 40, and it sounded better than stock but not better than the Super 40 I had on my 17. When warm/hot starting it would make a fluttering sound, and it was horrible. After reading these posts Sunday evening I went to Lowes and bought 12 Stainless Steel Hose Clamps. I cut up 3 beer cans into 3.125" squares to cover the 6 Resonator spots, using the clamps to hold them in place. WOW! What a freakin difference! I love the sound, and it was fairly cheap and easy to do. No more warm/hot start fluttering too!