what's the difference between the hyper and the racing medallion?? do both exhausts weigh 10 pounds?? any performance gains from those??

 

Look here: http://www.mackinindustries.com/exhaust.html

The Racing Medallion is generally a round cannister (N1 style) that comes with a silencer. It's extremely loud without the silencer in.

The Hyper Medallion more of a quiet exhaust... as aftermarket exhausts go...

...I didn't know Tanabe made anything for the S2000...

 

They don't weigh 10lbs. They weigh about 10lbs less.