I was parusing the MiniMania.com site and I came across this: MINI Cooper - INTERCOOLER MUFFLER DELETE PIPE - R55/56/57 MINI C - new.MiniMania.com I'm a fan of more noise from the turbine et. all so that seems cool. Questions: Does it really make any "butt-dyno" change in power? Is this a pain to install with just jackstands, basic mechanic's tools and a free driveway? Anything else I should know? Thanks!