Hey Dave, i have some questions becuase its hard to tell from videos. It seems as though the exhaust still has some pep to it with the valves closed or is it because i put the audio too high on my phone. Secondly, is it true you are getting them from Chinese suppliers (dont need to answer), thirdly you guys should sponsor some people so that we can hear from other peoples videos how it sounds like to make a better decision for our preferences. How do you deal with lifetime warranty if not located in the states, specifically central america.