I’m thinking if I should use the “BMC Carbon Air Box” or the “Power Booster”. Is there anyone who has installed one of the things? Other experiences? Is it supposed to be performance-enhancing, can someone confirm that?http://cgi.ebay.de/ws/eBayISAPI.dll…7912638820&rd=1 orhttp://cgi.ebay.de/ws/eBayISAPI.dll…7911506432&rd=1