The 700 HP RennTech CLS63 AMG - /TUNED

Hartmut Feyhl left AMG after 15 years to start his own tuning company, RennTech, which is now one of the most respected AMG tuners in the world. His products range from simple software upgrades to full racing builds based on AMG street cars. We take his new, 700 horsepower CLS63 for a spin and establish a new benchmark for luxury sedans: must be able to do burnouts while moving at highway speeds.

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The 850 HP E63 by Weistec Engineering - /TUNED
Matt Drives the 850 horsepower E63 on an empty toll road. Can he keep some tire on the car or will this be another episode of rolling burnouts?

The 900 HP Heffner Twin Turbo Lamborghini LP-560 -- /TUNED
/Tuned goes to Sarasota to visit Heffner Performance, the first company to ever build a twin-turbo kit for the Lamborghini Gallardo. In a barely marked, unassuming suburban shop, Jason Heffner turns out some of the tuning world's craziest creations. His twin-turbo Lamborghini LP-560 seems so right, however, that we feel it should be standard equipment from the factory.

AMG Hammer Sideways In The Rain !! (And a Factory Tour) - /CHRIS HARRIS ON CARS
Quick video this, but it's not every day you get a spin in a factory owned AMG Hammer. We also had a trip around the factory at Affalterbach and saw some other cool stuff.

The 1,100 HP Switzer "Ultimate Street Edition" GTR - /TUNED
It wasn't long ago that driving a 1000+ horsepower car came with many sacrifices. These were race or show cars, not to be used daily. Enter the Switzer "Ultimate Street" GTR. On pump gas, it makes 1,000 horsepower with virtually no downside. On race gas, it makes 1,100 horsepower. And the owner of this particular GTR uses it as his daily driver to commute to work. Is 1,100 horsepower enough to get to the office? We'll find out. **Update** 0-60: 2.5s, 1/4 Mile: 9.4 @ 150, Standing Mile 208 mph.