King 25001-378 Rear Piggyback Reservoir Shock Set for Lifts - 2.5 6

The King Shocks 25001-378 is a rear piggyback reservoir shock set featuring a precision-bored 2.5" diameter shock body, purpose-built for vehicles running a 6" suspension lift. These OEM Performance Upgrade shocks deliver a significant step up in on- and off-road damping capability while maintaining full bolt-on installation compatibility.

Key Features:

• 2.5" diameter shock body — precision bored for optimal support and consistency across a wide range of on- and off-road conditions
• Piggyback external reservoir — dramatically increases fluid and gas volume, lowers operating pressure, and reduces heat fade for sustained damping performance
• Large 7/8" hard chromed shaft — heat treated and micro polished for long-term durability and smooth operation
• Aircraft-quality billet aluminum components — including a heat-treated 6061 aluminum alloy piston for lightweight strength
• Custom-tuned valving — developed through extensive dynamometer lab testing and real-world use to deliver the optimal damping curve
• Custom valve adjustability — shocks can be re-valved with simple hand tools to fine-tune ride quality
• 100% hand built in the USA — assembled by King's experienced shock technicians to precise tolerances
• Fully serviceable and rebuildable — designed for long-term use and rebuilt after years of extreme off-road duty

What's Included:

• Pair of two rear 2.5" piggyback reservoir shocks
• All necessary washers, bushings, and nuts for installation
• Detailed installation instructions

The King 25001-378 shocks are covered by King's 90-day manufacturer warranty against defects and premature failure. Part number 25001-378A designates the adjuster-equipped variant of this shock.