Singer Vehicle Design is a well-established name when it comes to luxurious Porsche 911 restorations, and this time they're going all out.
The Californian company just announced that it is collaborating with Williams Advanced Engineering on a project using a modified air-cooled, 4.0-litre naturally aspirated Porsche flat-six that makes 500 horsepower.
Being a modified version of the 3.6- litre flat-six from a 1990 911, both Singer and Williams consulted Hans Mezger, the man who designed Porsche's first flat-six and many others, as a technical consultant for this project.
Specs: four-valve cylinder heads, dual oil circuits, titanium connecting rods, aluminium throttle bodies, carbon fibre intake trumpets, and a carbon fibre air box. There are also ram-air intakes built into the 911's rear quarter windows and a titanium and Inconel exhaust. Singer says it's good to rev beyond 9000 rpm.