While the CLK GTR and CLK LM raced in the FIA GT series and 24 Hours of Le Mans, Mercedes produced 25 road cars from 1998-1999 after the GIA GT1 class was canceled in 1999. This road-going version brought a lot of components over from the racing version, including that massive V12 engine. However, the displacement of the engine was increased to 6.9-liters and the racing air restrictor was removed. This results in 604 hp and 572 lb-ft of torque. At the time, the Guinness Book of World Records regarded it as the most expensive production car ever built, at a price of $1,547,620, which would equate to around $2.3 million in today's money with inflation taken into account.
Related - 2018 Mercedes-AMG GT R Coupe Gets Official U.S. Pricing
Speedracer38 recently filmed a CLK GTR SS's exhaust as it made its way back to the RENNtech headquarters after a day at the track. This car has a bored-out 7.3-liter V12 that has 720 hp on tap.
