Watch the record-breaking run in the video below.
Bellof's pole time around the 'Ring in a Rothmans Porsche 956 Group C auto and his subsequent all-time race record of 6m16.85s were never beaten in competition conditions.
The record vehicle is a heavily reworked version of last year's Le Mans victor, with Porsche upgrading the aerodynamics to produce 53 percent more downforce and lowering the weight by 39kg (85lbs) to 849kg (1871lbs).
The new Nürburgring Nordschleife record has been set today, and it stands at a staggeringly fast 5 minutes and 19.55 seconds.
And what a race auto it turned out to be!
Porsche reportedly broke Bellof's time earlier in the day with a 5:24.375 run from Bernhard, before setting the ultimate lap in a subsequent run.
It also has 50 percent more downforce and active aerodynamics, including Formula 1-style Drag Reduction System incorporated into its rear wing.
Driven by Switzerland's Neel Jani, the Porsche lapped Spa in just 1m41.77s on 9 April, almost a second quicker than Lewis Hamilton's Formula One lap record of 1m42.553s when he took pole position for the 2017 Belgian Grand Prix in his Mercedes F1 vehicle.
Even so, the 919 Evo still clocked mind-boggling speeds at various points on the circuit. Porsche has withdrawn from endurance racing, meaning the auto no longer needed to meet class regulations.As a result, Porsche reworked the Le Mans racer's aerodynamics to produce 53 percent more downforce than the 2016 vehicle it's based on, while reducing its weight by 85 pounds to 1871 pounds.