The Porsche 911 began its sports car reign back in 1963 and has sprouted many different generations with various improvements and advances with each one that passes.
As you may know, the first three generations of the 911 used an air cooled engine, ending with the 996 series in 1998.
Singer Vehicle Design saw benefits in the use of an air-cooled engine, so much so that they decided to build their own modern interpretation of the early performance-focused 911.