Here’s How Singer Turns Air-Cooled Porsche Engines Into 8,000-RPM Monsters

Last year, Porsche restomod and reimagining company Singer revealed its 420-horsepower, 8,500 rpm, 4.0-liter flat-six with its own special four-valve cylinder head. Now the company is showing off more of that new engine, revealing some of its tricks along with the help it got from the engine experts at Cosworth.