Small Note: All Mitsu's like the DSM's and C53A Colt Turbo's received a 3 WAY CATALTYIC CONVERTER with no air provision. You can use a CAT with an air provision but just leave it plugged as they come that way. Do not purchase a 2 WAY catalytic, so this will help you to know what to look for. This is what my car needed all along, including after converting it back to stock in every way and flushing the gas!