Is there a company that makes cool air intakes for these trucks? If not can someone post some pics of ones that you have made so I can get some ideas, thanks. P.S. This is for my dads truck and he wants a little more power for pulling his 25' camp trailor. I made a custom intake for my cummins, so I don't think I will have any problems making an intake. He just had a straight threw muffler installed and said he noticed a little more power. The truck also has 135,000 mi. all orig. W/ a beefed up trans.