Upgrade your SP2 or Series 3 Piggyback Shocks with one of our Cartridge Upgrade Kits. These kits allow you to step up to the convenience of our adjustable piggyback shocks. Cartridge Upgrade Kits allow on-the-fly tuning for various terrain! • 3.3 Fast Adjust Piggyback Shocks offer a wide range of adjustability for specific terrain and/or handling characteristics • Fast Adjust Knob w/ 3 compression settings for large damping adjustments • Settings include: Soft, Custom, Firm • Custom setting includes an 8-Position Dial for finer damping adjustments • Ideal for daily driven Jeeps as well as the serious enthusiast wanting to adjust damping for all driving conditions Fitmen Shock • JL Wrangler (2-door) • JL Wrangler Unlimited (4-door) • 3.1 Piggyback • JT Gladiator (pickup) • 3.1 Piggyback • JK Wrangler (2-door) • JK Wrangler Unlimited (4-door) • 3.2 Adjustable Piggyback (Discontinued) • 3.1 Piggyback