My motorhome is a 1995 Class-C Ford E-350 with a 460 EFI engine...I have upgraded the exhaust with Thorley headers following the dreaded exhaust leaks and snapped bolts...I am now ready to upgrade wit...
K&N filters flow air really well but they don't filter as well as a plain old oem filter. Air filter tests are probably what made "bob-is-the-oil-guy" famous.