90-93 Honda Accord High Flow Catalytic Converter (1990 1991 1992 1993 91 92) THESE ARE RACING CATS.. WILL NOT PASS SMOG.. HI-FLOW RACING CAT CONVERTER INCREASE AIR FLOW AND PERFORMANCE GAIN UP TO 10 HORSE POWER 2.5" OUTLET, 2.5" INLET GASKETS, AND HARDWARE INCLUDED OFF-ROAD USE ONLY. DIRECT REPLACEMENT FOR OEM PARTS. EASY INSTALLATION BUT PROFESSIONAL INSTALLATION ARE ALWAYS RECOMMENDED