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Hi everyone, The problem I,m having is my engine has just started backfiring since i installed 3inch exhuast from header back. Combo is 472 je pistons h beams 225 shot of nitrous 3000 stall c6 30 gear fresh engine didnt start breaking up and backfiring till i installed the 3 inch and only with the nitrous on w.o.t.?? lean ?? some direction to take installed new colder plugs dui ignition sys. Any ideas. Thanks in advance Chuck
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