Kevin,
The dealer I bought the truck from normally charges ~$1600 installed (each) for the headers and the exhaust. I bought on a GMS discount so they gave them to me for $1200 each and I let them do the install. You can probably find the gear for $700 or so (each). The exhaust install looks fairly easy (check out the instructions at
http://www.corsaperf.com). I probably wouldn't tackle the headers, although I just did an install of a set of Banks headers on my Wrangler.
As for performance, I've only done an hour or so on the new setup, but I'm very pleased. It's as quiet, or quieter than the stock setup at idle and light throttle (good for Momma) but really gets your attention when you kick it (good for me). It's definitely quicker and has alot more midrange torque. One other unexpected thing I've noticed, it's lost alot of the tendency to kick down when in cruise control on moderate grades.
Don't have a read yet on any mileage improvements - I'll have to get past the fun of doing full throttle take offs before it'll be a fair thing to look at.
Have fun,
Chewy
