My 08 RAV (4cyl, AWD) has been down some pretty nasty trails... muddy enough to ball up on all 4 tires to the point that they wouldn't steer or turn. Don't do that... the weight of the mud will pull all those pretty plastic wheel wells down and the traction control is a nightmare I could do without. It's not all fun for me, I actually sample creeks under flood conditions as part of my work. Like Dr. Dyno I found out the evap system is a bigger concern than the skid plates, but I really should invest for some solid metal for both. I have the metal 09 style guard on the filter itself, but the plastic lines from the tank have been ripped off on several occasions and I think there's a part to the left of the filter that disappeared a couple years ago. Whoever thought they should put plastic under a 4x4 should be shot. For those that don't think a RAV can take a little abuse, drive off the highway and learn a little.