the initial lean spike thats common with many systems is nothing at all to worry about. Try making sure there is no fuel leaks and make sure that your fuel AND nitrous lines are as short as possible. If your still going lean then you have a problem thats occurring all the time and not just when you spray.
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2003 DSG GT 5-speed
Hellion 62mm and Flowmaster catback.....
My bonestock 2v engine had been through 2 years of NX 100 shot, 3 years running 8-12lbs vortech s-trim, got into boost daily while racing on the weekends, had 157,000 miles on it, and was running like new
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