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Does it sound like it has an exhaust leak> If you have a leak at the flange to the head ( very possible on used headers IF they are) then your upstream O2 sensors will be seeing waaaay too much air and richening the hell out of your engine....causing it to run like shit.
 

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Discussion Starter · #20 ·
ok before this header was put on the car seemed like the cats were stopped up and even with the new header it acts the same way when u give the car gas it chokes its self out and im about to get tired of this rig
 
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