Jan 21, 2009 #1 STOCKSRT10 Full Access Member Joined Dec 9, 2008 Messages 143 Reaction score 0 Location milwaukee why are there four cats in the first place
Jan 21, 2009 #2 wesalbert 2015 Truck of the Year Supporting Member Joined Feb 26, 2008 Messages 9,775 Reaction score 7 So it has a chance of passing emissions............ duh :laugh:
Jan 22, 2009 #3 FerrariTruck Full Access Member Joined May 19, 2006 Messages 3,719 Reaction score 1 Location LOS ANGELES, CA They each control a different emission, One is for hydrocarbons and the other for Nox.