thus far on this forum I've seen the HKS piping get hooked up with stock muffler and cats, hopefully more vendors do the same, otherwise I'll just go GTHaus in full.
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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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