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Old 04-11-2002, 11:26 PM   #6
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Join Date: Dec 1969
Location: SF
Posts: 11,845
My Ride: 03 Ti Silver M3
Originally posted by opp
they are built in,,,, and smog legal!
Not sure who you have been talking to but this is 100% incorrect. The Supersprint headers require either a racing cat or a cat replacement pipe both of which are not street legal. On top of that you either need to use a O2 replicator or program around the OBDII of the ECU.

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