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Message: [QUOTE="jaguar, post: 1480203, member: 19340"] man, you should of contacted me about this. The pipe calculation program doesn't tell you all the best pipe dimensions. It gives you a starting point and then lets you make changes to check the results on the pipe powerband graph each time. That allows you to tailor the output to your own needs/desires. If you don't care about over-rev and just want more peak power then shorten the belly and the baffle cone. Also making the stinger more narrow will increase back pressure which benefits peak power at the expense of low down power. I have lots of satisfied users but each program is just a tool and the results are as good as the skill/knowledge of the user. [URL='http://www.dragonfly75.com/moto/calculators.html']www.dragonfly75.com/moto/calculators.html[/URL] [/QUOTE]