They came in the mail today! Man, they're big!

I had to install them immediately!
The pegs are held in place by a single pin, secured with a cotter pin.

It takes a pretty good tug with pliers to get the cotter pin out. It helps to rotate the peg up and down. Once the cotter pin is free, the main pin has to be removed. I used a screw driver and hammer to tap from the bottom. I'm normally not an OSHA guy, but I suggest wearing some kind of eyeglass while pulling the pin out; the spring inside the peg, once loose from the main pin, zips out pretty fast. Mine shot about ten feet behind me. Thankfully I was doing this in the driveway rather than the garage. It would have taken forever to find that spring.
Once removed I could place the pegs side-by-side for a direct comparison:

Yup, still big!
The Rally Pegs fit like a champ. The only problem is the springs. They're a bugger to get in and lined up. The solution:

I'm sure that there are more ways to skin this cat. But lining it up with a nail worked for me. One nice thing about the main peg it that it's hollow, allowing me to do this:


The spring puts tension on the main pin, so it won't slide into place. I used a c-clamp to slowly nudge the main pin downward. Worked like a charm.
Before:

After:


The Rally Pegs are a marked improvement over stock. The added width provides much more stable footing. Yes the pegs are expensive, but the additional stability is worth it (IMHO).