Because we're children of the '70s and students of the reruns thereof, it's hard for us to eyeball the MTM logo without hearing a kitten's meow in our heads. But Roland Meyer's company is not in the business of building cars for Mary Tyler Moore, they are in the kit business nonetheless. Some would consider MTM the premier Audi tweaker, and its two new tuners are preserving that opinion in low-key fashion. The firm's kitted up the Audi S6 to match its S8 sibling in performance by speccing up the S6's 5.2-liter V10 to reach 450 hp. While the company's left the S8's powerplant as is (isn't there something they could do?), they've improved both cars' suspension (stiffening the S8's air ride and adding coil-overs and springs to the S6's forward mechanicals) and beefed up their exhaust note. Now if only we can get the Bob Newhart Show theme out of our heads.