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napa 6637

  1. 98 E450 Superduty 7.3 Napa Air Intake Mod

    94-98 7.3L Performance Parts
    Hello Everyone, I am new to the diesel world and just bought a 98 E450 Ecoline with the 7.3 powerstroke (made in 97), and got it looked over and the air intake box up top was cracked and missing some of the plastic so it needs to be replaced. I was wondering if instead of buying junkyard parts...
  2. Urgent DIY 6637 air filter warning!

    99-03 7.3L General Discussion
    Hello everyone, I did a quick search to see if this was a widely known problem and didn't see anything, and I think people running the 6637 filter should know if they don't already. If everyone else is already enlightened about this then I'm sorry for wasting your time. Bottom line up front: I...
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