The reason why I asked this question in the first place is because I love the GTHaus exhaust and I ordered the rear section after seeing it on youtube but I really don't know what to think about their y pipe configuration. They state that they actually lost significant power running true duals.
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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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