One more comment I'll add. If you look at Barry's picture of the one where you can see the bolts, look at the front of my radiator. I live in the country and I have about 200 yards of gravel to travel on before I get to the highway. I was worried about rocks coming up off the front tire and possibly damaging the rad. So I got a piece of stainless screen that they call "10 mesh" which is 10 holes per inch, and sandwiched it between the fan and the rad. It also keeps the bugs out and is easy to clean with a high pressure washer, as long as you aim the washer down instead of straight at it.