Rich is dead on about how he described the stage 4. Mine was installed last year at TRR. Working with Corey to install it is an added bonus for sure. The transformation is immediately noticeable. I now have 30k miles on mine. It has been through two TRRs, Little Sahara (with jumps), snowball pre run and actual run. Have I come across details that needed worked out, yes, has RPG been there with me the whole way, yes. I was one of the first to have the stage 4, my nationals saced out because of the low arch they offered at first (-1.5") . RPG helped me get them exchanged, and they no longer offer that negative ride height. I had an issue with my tie rods, I unfortunately had to put the stock rods back on for a while, what a noticeable difference. I couldn't wait to get the RPG rods back on. But RPG stood by and corrected the issue.
Rich isn't kidding when he says that not only does RPG stand behind their product, but they make you feel like family.
For those of you coming on the south Dakota buffalo run, you will be able to check out two RPG equipped Raptors with state 4, Huck and myself. I can't speak for Luke, but I'm willing to let some take the truck for a spin while we are hanging out back at camp. Don't be afraid to ask.
Yukon Joe
Buffalo Run Support Raptor
http://www.fordraptorforum.com/showthread.php?p=364119