Gliders

[davidbrady]

Hey Gary,

Here's a page with all the official EPA publications. Detroit Diesel added EGR systems beginning in 2004 to reduce Nitrogen Oxide emissions. Here's a page showing the various NOX, NMHC, and Particulate emission standards they been trying to achieve since then. In 2004 the NOX emission restrictions were effectively cut in half, then in 2007 they were reduced by a factor of 10! Here's more on the 2010 standards.