I too am looking at getting HFCs. Right now my selection is down to Z1 or Berks. My reasoning is because these two have the support brackets which help keep the exhaust from bouncing around. Just my .02C.
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USCG Veteran, 2014 370Z Touring, Sport, Nav, Stillen G3 intakes, Berk HFC, Invidia Gemini CBE, Hella Supertones
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