Fast Intentions is the most repped exhaust here however the whp gains between each exhaust differ by marginal numbers. There is no real exhaust that is head and shoulders above the rest. Stillen is ok, Fast Intentions is great but will tend to hang low. In the end it comes down to how you want your car to sound for the minimal differences in gains between each setup.
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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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