Check out Fram Product Reference Guide @ " http://www.framcatalog.com/RelatedInfo.aspx?b=F&f=FRAM/FPR2010.pdf ". Gives a break down by height, inside and outside diameter and Fram part number, can then take that to vehicle used in. Might even be worth downloading and saving in case it dissapears in the future. Only problem I have found is some filters may no longer be available at your local dealer, especially if they were used for a very limited number of vehicles originally. Or may have been discontinued since 2010. Found a perfect filter for my housing, but no longer available so found a close second choice. Doesn't say you have to buy Fram, but can also cross on WIX site from a Fram to WIX number. The same on K&N site. Canuck
Call K&N's tech line, they'll ask you about your engine (including carb / TB opening diameters), calculate CFM needed, and provide filer recommendations based on all that and how much room you have under the hood for a filter. Don't cost a thing. They'll also sell you the filter if it's an off the wall item that the local parts place isn't likely to stock. Gary