1. Jun 18, 2012 #1
   

   Datgap New Member

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   Is it worth getting high flow cats for my ls1 with the hsv extractors and 2.5inch xforce catback , the engine is stock as a rock , would i see much gain, deeper exhaust note etc thanks
   

    

   Datgap, Jun 18, 2012

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2. Jun 18, 2012 #2
   

   Surfwagon Well-Known Member

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   Definitely, when I fitted my Ballistic cats the exhaust sounded a little deeper but the best thing was that the light drone Present in HSV Z's even with stock exhaust was gone.

    

   Surfwagon, Jun 18, 2012

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