My 1992 940GL failed the Maryland emissions test. To correct the problem, I took it to three separate "Volvo specialists," including my local dealership. All three told me the catalytic converter needs to be replaced and quoted me between 0 and 00 for the part alone. However, when I do a search on-line for an OEM part, the prices go for around 0 dollars. This makes me think that OEM parts are significantly different from genuine volvo parts. However, according to what I've heard, and this site in particular: [URL]http://www.alloemvolvoparts.com/oem_vs_aftermarket.html[/URL] It says OEM parts are effectively the same as genuine parts. Could the markup really be that high? Thanks, - Ray P.S. How could I tell if my catalytic converter needs an EGR valve?