1) I just got done putting in the auto meter Phantom guages in my truck,I put in the pryo,boost,and transmission. Now a few guys I know said I should put a chip in. Now what kind of chip is the question. I pull a 28' Jayco eagle 5th wheel. 2)My friend says that I should use an OEM air filter over a K&N or AFE he thinks that the OEM are just as good... ... ... . Thanks