A one-off BMW M5 CSL was unveiled at the company's Nurburgring workshop. The prototype is a unique M Division example that forms part of the M5 brand's 25th anniversary celebrations.
The big news is the engine which was modified from the factory 5.0-litre V10 to a larger 5.5-litres via increased stroke, making it M Division's largest ever. Modifications include a carbon fibre manifold with an increased capacity air box and secondary oil cooler. As a result another air duct was created on the front bumper to accommodate it.
One way to qualify as a CSL (Coupe Sport Lightweight) is to shed body mass, which this one did. A carbon fibre roof was employed and some interior parts stripped down. For example standard front seats were replaced with carbon fibre units and the rear one removed completely. A total weight saving of 50kg was achieved. The suspension was also slightly modified but kept close to standard.
Long-time BMW race driver Claudia Huertgen has taken the car around the ‘Ring and claims to have posted a sub-8 minute time.
