Finally got up the courage to trim my front mudflaps. I was a little nervous, but I took my time and used the tin snips method others have talked about. Made sure the truck was level, measured the height of the rear flaps, marked that height on the front, then cut straight across, same height on both right and left (duh).
After cutting straight across, I took the piece that I trimmed off and traced the curves onto the mudflap. Since the cut flap is a little wider due to the taper, I traced one side, then slid the "template" over, and traced the other side.
Before re-installing, I decided to add Clearbra where the flaps touch the fender flares. This took a while, but if you've done any clearbra before, this wasn't too tough. Hardest part is the trial and error of getting it cut right, but after you get one cut, you can use it as a template for all four flaps (rear needs to be slightly larger, so I used it as my template). I've only had my truck for about a month and a half, so I wanted to do that as soon as possible to make sure that there wasn't any fender wear due to time.
Tools that came in handy:
--Tin snips-straight cut, left cut, and right cut. Helps with the curves.
--Files-double bastard (Aggressive) and flat-cut (smoother). Helps to grind down the serrations from the tinsnips and remove the little flaps that form from re-positioning the snips. Obviously start rough, then go smooth (that's what she said).
--Sandpaper/foam sanding blocks-80 grit through 400 grit. 400 grit really helps "polish" the edges so that they look factory. Same as above...work your way to the higher grit.
Here are some pics...let me know what you think or if you have any questions! I'm very pleased with the results and really glad I did it.