Bilstein's 8112 Zone Control Coilovers are by-far the most advanced OEM bolt in coilovers on the market today. With 3 compression zones and 2 rebound zones, the 5 total internal bypass zones will blow your mind. The extra rebound zone takes care of "top out clunk" common on other coilovers, and only fixable with limit straps. The 2 extra zones of compression take care of bottom out, by ramping up the progression curve, eliminating the need for air bumps. 

The 8112 Zone Control package gives you a coilover, bypass, bump stop and limit strap in one bolt in OEM fit package, for a fraction of the price. 

Because these coilovers have internal zones, it is important to keep the truck in that the ride height stays in the correct zone. This means that the lift height is recommended to stay between .5-2.4". 

Sold as a pair.