Nope you can't. The computer has specific intrusive tests it runs on the emissions system in the event of a believed cat failure. The typical simulator cant trick the computer when it runs one of the intrusive tests because the simulator is just not capable of generating the results the computer is looking for. Best bet is to save your stock stuff and change them out when you need to or have a shop cut your new down pipe and install an aftermarket cat.
2006 LS coupe, manual, Victory Red
Sportlines, FE5 struts, shocks, front swaybar, Progressive 22mm rear swaybar, Airlift load assist rear airbags, TWM ST shifter, smoothed TB, LSJ exhaust, debadged, demudflapped, Yokohama AVID Touring P195/60R15's. Soon to come 17x7 Motegi Tracklight 1.0. Best to date 15.402 at 90mph
"No friend ever served me, and no enemy ever wronged me, whom I have not repaid in full."
Lucius Cornelius Sulla
Last edited by Montecarloman; 03-18-2008 at 04:11 PM.