959 flat-six (Type 959/50)

Flat-6, air-cooled block / water-cooled 4-valve DOHC heads2.85 LSequential twin-turbo1986–1988444 hp

Designed by Hans Mezger. The 959’s race-derived flat-six (956/962 Group C lineage) — the first ROAD car with sequential (not parallel) twin-turbos and 4-valve water-cooled heads on air-cooled cylinders. 450 PS / 444 hp. Mezger’s technological tour de force.