Just changed original cats with direct fit magnaflow
Some systems actually depend upon a certain amount of restriction in order to work properly. The additional flow in the new system will mess with factory set flow expectations. If one of the O2 sensor wires have not been moved and have burned onto an exhaust pipe, You can either ignore the light if it's running well, or take the next (expensive) step and install a programmable engine control unit. However, in many states the light being on will cause you to fail inspection.
If you want to retain the exhaust system, you also could put a reducer in the pipe behind the cat to slow down the exhaust flow. It would not give you the added mpg that an open system will, but may restore the O2 sensor operation and likely you will still have the same sound effect that the system produces. Have a fault scan done...if it shows O2 sensor failure, that's where to go.
Apr 08, 2009 |
2006 Pontiac GTO