Price: $325 a piece (uninstalled).

PROS: I'm currently running 4.88 gears and LockRights front and rear. They're the single best addition I've made to my truck. With a locker, all 4 tires receive the same amount of power, even when you only have three tires on the ground. An absolute must for hard-core, twisty 4-wheeling.

CONS: When 4-wheel drive is engaged with the hubs locked, the turning radius is increased. When driving around town, I receive some rear-wheel chatter/bucking around corners. This can be somewhat overcome with a 'goose' of the throttle or completely off the gas. There is some noticeable twitching of the rear when quickly shifting under power.

BOTTOM LINE: A MUST for the ultimate in traction. Some of their quirks may not be for everybody on a daily-driven vehicle. After getting used to their idiosyncrasies, you hardly notice them at all, except after you conquer that last nasty trail section!!