I didn't have any hiss with the Berk Cat Backs until I installed their High Flow Cats...Personally, I don't think this setup sounds too bad even with the slight hiss.
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mults
40th Anniversary 'Z', 312.06HP/260.58TQ (Dynosty EcuTek Tune)
Build Date/Number: 1/27/2010 #706
Berk HFC + CBE, R2C CAI, Clear Bra, Cleveland Z Club
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