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Singer and Williams are joining forces on a meticulously modified 4.0L Porsche flat-six

The company consulted Hans Mezger, designer of the original Porsche flat-six.
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Singer 500hp 4.0L

As if Singer's highly-coveted 911 restorations weren't incredible enough, the company has teamed up with Williams Advanced Engineering to offer a modified version of a 4.0L Porsche flat-six. The engine will find its way under the hood of an upcoming 1990 Porsche 911 build and will produce 500 hp.

It will boast an impressive list of specs that include four-valve cylinder heads, an engine speed range that goes past 9,000 rpm, dual-oil circuits, cylinders and pistons with titanium con-rods, aluminum throttle bodies with carbon fiber trumpets, upper and lower injectors, a carbon fiber air-box, and much much more. 

singervehicledesign.com

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