Intake System
Intake SystemBoxster S (987) M97.21
Double-flow Distribution Pipe
Similar to the Cayman S (987), the engine of the Boxster S is equipped with an intake system with a double-flow distribution pipe. With this system, the distribution pipe flap in the intermediate pipe connecting the two intake air distributors is closed in the low rpm range. The distribution pipe features a partition wall running along its length (between the electronic throttle and the distribution pipe flap in the intermediate pipe). In the low rpm range (with the distribution pipe flap closed) the 6-cylinder engine behaves like two 3-cylinder engines running in parallel, resulting in an improved torque characteristic in the low rpm range. The distribution pipe flap is opened in the 2 rpm ranges from 3,500 to 4,900 rpm and from 5,200 to 7,300 rpm.