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hfc adapters

  1. kuni

    Exhaust Custom Prospeed High Flow Cats - NA1 header to NA2 exhaust fitment

    Selling a pair of Prospeed high flow cats, set up to mate NA1 headers to NA2 exhausts. I believe these are 300 cell (you can examine the pics below to see inside), and have the necessary bungs for OBDII users who need to run secondary/downstream O2 sensors. If you have a OBDI car then I'm...