That's the wrong picture for your car, that picture is for Tiptronic transmission cars. I believe it goes to a change-over valve, #18 in this diagram.
See this thread and Jager's explanation of how he fixes it, post #17.
Why don't My Secondary Air Injection Components Look Like This?
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2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |
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