Hi guys I just stumbled on this thread and I have a few things to say about ES pipes, last year I purchased a few of these pices of junk. Mine were installed on DA 50's the power was excellent but both pipes failed at around 10 flights the baffels came loose. To make a long story short Ed refused warranty and when I sent the pipes back to him he refuses to give them back to me. So I'm out $500.00 ED is the type of guy that will make any excuse to get out of warranty and I would caution anyone to not do business with him or at least be aware of what could happen. If I had got 100 flights on my pipes I would have been happy. I have since switched to KS pipes and I'm more than happy I have some with more that 300 flights on them with know problems Just my .02