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When installing a race header instead of a shorty, does anyone know if there are any sensors or switches that connect to the cat, that will be misplaced once the cat is removed?
 

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the raceheader has the ports pre-drilled for them...you just have to transfer them over. A word of advise (anyone can agree or disagree with me
) connect the EGR tube before bolting the header to the car.
 

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agreed...connect the EGR before mounting the header...also there is a bolt that holds the EGR tube on the front of the engine...i removed that bracket to allow for some flexability
 
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