No, by getting 8psi with aftermarket exhausts. Frankly, if you compare it to the GTM S/C problems, Stillen is definitely ahead. Its much easier to resolve an issue with an UPRev rom or tune than realize that your kit doesn't work well with free flowing exhausts.
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2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 
2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling
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