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A co-worker of mine picked up an 08 diesel and is having issues with the catalytic converter. If he drives around in town for two hours or so, his over head will display a warning that his cat is 80% plugged. Once out on the hiway and getting some flow through the engine then it will blow the 'soot' out of the cat. His question to me is can he straight pipe this year or will he need to get some software in order to fool the computer. The truck is basically stock, 4X4, manual trans. He is worried about the cat plugging up and then having to purchase a new one. I am not familiar with the CR so any help would be great, thanks.
