Two years of cylinder head development, using full 3D computer aided design (CAD) were initially needed to get the performance John Cooper Works demanded. Using this CAD data, the heads are fully CNC machined. This ensures the highest standards of accuracy, repeatability and performance. Statistical data taken from the production of many cylinder heads and blocks enabled the compression ratio to be optimised within the limits of performance, engine calibration and production tolerances. Top-class repeatability and performance are guaranteed.
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