[SD987]

986/987 S brakes also use a power boosted brake system not used on the base models that requires less actuating force, thereby making the response more direct.

The Boxster S employs a mechanical vacuum pump instead of a conventional sucking jet pump to provide the vacuum for the brake booster. The pump is driven in tandem configuration together with the oil extraction pump of the right cylinder head (bank 2, cylinder 4) by the exhaust camshaft of the right cylinder bank (bank 2, cylinder 4–6). This design enables a high and constant level of vacuum supply and subsequent effective brake boost even when the most unfavourable underlying conditions apply, e.g. low external air pressure at high altitudes, and in highly dynamic driving involving a high proportion of full-load operation, e.g. on race tracks.

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