Due to the water cooling for those heads, the Singer DLS Turbo cannot claim to have the most potent air-cooled engine.

Singer has unveiled the ... new upgrades for the new car’s engine, chassis and body. The project is known as the Dynamics and Lightweighting Study (DLS) and will form the basis of many future ...

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You’ll need to get a wriggle on and find one because ‘restorers’ of 964 Series 911s, Singer, plans to take another 99 off the road to create the same number in DLS-T-form, a 700bhp ...