I think some people use a breather filter on the valve cover just for that purpose. That return line IS for the EGR, but I'm not sure is there will be a real performance advantage to it on a stock Sentra. You might notice a fair bit of pinging if you disconnect the EGR system. Especially on 87 octane. Anyone want to add to this? Ken +----------------------------------------------------------------------+ Have questions about your car? Try here: http://www.sentra.net
