Have had the cbe on for a few months and I think I was the first to realize the test pipe did not mate to the mazdaspeed exhaust. Ken and the gang did their best to fix it before there was the redesign with no luck. Back to the present the test pipe is fixed and I had them install the dp because I didn't have the time/patience to do it my self. The install didn't go as smoothed I we had hoped they had trouble with one bolt on the old down pipe but they stuck with it and did a excellent job. now for my impressions, must say it's a nice improvement. way more power then just the cbe exhaust and a nice gain over just the test pipe/cbe and nice sound, deeper and louder (with out being to loud or obnoxious in my opinion) will be at the Protege Garage meet the 29th for anyone local that wants to see/hear it and I will hopefully have Ken make a sound clip then to post.