If you actually look the pipe diameter on the OEM axleback its pretty big(NOT 70mm but not to far off) but I'm sure the dyno would say I'm losing a little bit of power, thou the butt dyno doesn't say that. I have had this setup for the past 6or so months and I have absolutly no problems or complaints about it, and the best thing is not one ticket nor getting pulled over for a loud exhaust. I don't know of any other companies, again it would probrably have to be another custom thing. BTW Mike here's a picture of the little ****** LOL

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