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As a FYI datapoint, my 2002 S just passed smog in San Diego, with secondary cat eliminator pipes ;o) Measured was a fraction of allowable. The tech (thorough, but his first Boxster) gave up looking for vacuum hose check etc. when I explained you have to disassy the car to get to the engine compartment. He just plugged in, ran the dyno, and passed me.
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