Uses Spesh’s long standing FSR (4-bar Horst link I think?) system, which is pretty bloody good… I loved my Enduro SL (carbon s-works), particularly with the E150 fork up front, it’s a key component in what makes the frame great… CFH on here rides an ’08 Enduro, no doubt he’ll be along at some point to extol the virtues as well 😀
As it so happens, I have an E150 fork you could have for a reasonable price… let me know if you’re interested 😉 Seriously, disregard the guff about this being a bad fork, early ones had issues, but Spesh sorted them out and it really is a bloody good piece of kit!
Re. setup etc, there’s tons of info on the mtbr.com Specialized forum, just need to have a dig around to find it. Look for users Kelstr and Spesh Suspension Tech (I think that’s his name), they’ve done stacks of FAQ’s and servicing/setup guides for the AFR rear shock and the E150 fork.