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Are you sure that it's leaking where the flanges seal to the heads? You might have a crack in one (or more) of the primary tubes at the flange. My 2000 S stock header/cat units recently developed this condition, and it's hard to see with the headers installed on the engine. I have no fault codes yet, but there is some noise.
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Blue-S
2000 Boxster S 6-speed - Ocean Blue / Savanna Beige
* 9x7 short shifter * Pedro's enthusiast mount * Carrera Ltw. wheels * Stebro bypass pipes
* M030 coming soon! *
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