Performance Mods - Engine - 5.7 Hemi V8
Hey guys,
I have an '04 with a few mods,(K&N CAI, Dal exhaust, and long headers). Recently i bought the Superchips Cortex Tuner and uploaded the 87 octane tune, soon after i got the P0420 code for the Catalytic effiecency Bank 1. i only have 68,000 miles on the truck so i wold be suprised if...