I have some Q's, I just bought a 00 F250 and was looking underneath it looks like stock exhaust but no converter. Was that normal in 00? Also what is the best air intake system for my model pickup or do I need one cause my 6.0 did not need one unless I was gonna build big power. Is banks ram air system good or which is a better buy, I want max air in but do not want to pay for the name. Thanks in advance.