Just got a 2006 Pathfinder SE 2WD with about 80,000 miles on it. This truck replaces a 1999 Ford Contour (huge improvement!!!). I am loving the truck so far, although I think since I have purchased it gas has gone up about 20 cents a gallon.

After reading the forums I have decided to tackle the transmission cooling system in the radiator. I plan on installing an aftermarket cooler and hopefully avoiding a very costly transmission repair.
A quick question if I may. I am looking to replace the stereo system in the vehicle and would like to know what size speakers I am going to need. Does anyone know of a resource that I could use to find this info? My pathfinder does not have the bose system in it and could use an upgrade.
Thanks for the help in advance!