Can anyone comment on the Active Power stainless exhaust system? Has anyone actually bought one? The ads indicate it fits all 986 Boxster models, but one review says it didn't fit their car without mentioning what model they had. So, will it fit on the 3.2 ltr model or only the 2.7? Is it of heavy enough gauge construction to actually last for more than a few DE laps. Does it have the typical droning problem that most of the aftermarket exhausts are subject to?