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Originally Posted by Adam
.....I believe if you get the headers cat combo, the precat is eliminated on the 03/04 boxsters and you just have the one pair of high flow cats which would be much better than 4 factory cats. This may be incorrect though because I am not 100% sure. Can anyone varify or give us info that says otherwise?
Thx.
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The Dansk headers does have 'bungs' for the additional O2 sensors which 03/04 cars comes with...