During the heyday of the muscle car era, making extra power or at least making it sounds like you had extra power was of utmost importance. The big American V-8’s packed plenty of power right off the lot, but since most drivers couldn’t necessarily afford to actually make their car the highway star they saw on the drag strips, they usually opted for the latter and to get that big block power tone, glass packs were the ticket. Scat Cat was one of the earliest manufacturers in this area and called their signature exhaust note “The Boss Sound,” quickly making them a favorite among enthusiasts.