I tried, didn't work. Had to go back to stock everything but catback and pulley. Even had to go back to stock tune to pass smog check. The smog tech went over mine with a fine tooth comb, laying on his back with a mirror looking underneath, asked about my gauges (fuel pressure,boost,wideband a/f ratio). He had no idea about anything but that it was not stock. Be careful where you go to have your smog done. Good luck.