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Rancho RS5000X Rear Shock Absorber Set For Silverado / Sierra / Ram / Hummer H2 The core of this new and innovative shock from Rancho® is the unique rebound valving system and an advanced compression phase of the shock absorber. This proprietary process developed by the ride engineers at Rancho will elevate the overall handling and performance of your vehicle on and off-road. Progressive Engagement Valving The Rancho RS5000X series design includes progressive rebound and compression discs. At lower speeds or in the earlier stages of the shock’s travel, an eccentric disc in the valve shim stacks will engage the valving at lower frequencies, helping to control the energy of motion as the cycle of the shock increases or decreases in its action. When hitting a pothole, off-road trail obstacle or similar activity, Rancho’s Progressive Engagement Valving allows for early flow of fluid, helping to reduce harsh initial impacts and to control the flow of fluid in a progressive, gradual manner through the valving. During on- or off-road driving activities like washboarding or when travelling a rough fire road, the early flow of fluid helps to minimize a “rough” ride as the piston movement is able to glide through the initial travel motion of the shock with minimal ground impact or force. If needed, the Progressive Engagement Valving will further engage to maintain control and stability. Tuned Compression Control Valve The Tuned Compression Control Valve is a custom-tuned, clamped disc base valve that regulates fluid transfer during the shock’s compression cycle to help absorb impacts without disc flutter and to help maintain vehicle control in virtually any environment. The precision-tuned shim stacked valving allows the motion of the shock to work in harmony with the vehicle during on- and off-road driving. Enlarged 2-1/4-inch Twin Tube Body The RS5000X series features a 2-1/4-inch diameter shock body. A larger shock body allows for increased fluid capacity to operate cooler and to increase vehicle control and performance at varying speeds and terrains. The RS5000X series combines a larger shock body with all-weather fluid, allowing the shock to withstand internal temperatures between -40 and 248 degrees Fahrenheit. Gas Pressurization of Shock Each RS5000X shock is gas pressurized to 150 PSI.* The twin tube, gas pressurized shock has a variety of advantages including minimizing air-to-oil mixture that can cause foaming and shock fade. Gas pressurization also provides a mild boost of spring rate to the vehicle. 16 mm Nitro-Carburized Rod Every Rancho RS5000X shock piston rod is strengthened through a nitro-carburizing process. From increased scuffing resistance to additional protection against corrosion, the process enhances the shock’s overall durability. Nitro-carburizing also is more environmentally friendly than the chroming process Full-Displaced 35 mm Bore The RS5000X’s 35 mm bore helps to provide heightened control of shock motion due largely to the expanded piston area. Full-displaced compression valving allows the piston to displace more fluid than traditional rod displaced valving. 1-3/8-inch Diameter Sintered Iron Piston The sintering process forms objects from powders using atomic diffusion. The powdered material is heated to just below its melting point, fusing all of the particles together to create the piston. This process brings increased structural conformity to each Rancho RS5000X piston. Fitment Guide: ---2014-2017 Silverado 1500 2WD / 4WD - w/Rancho® RS66308B or RS66309B System - 4.5" Lift ---2014-2017 Silverado 1500 2WD / 4WD - w/Rancho® RS66301B or RS66302B System - 6" Lift ---2007-2013 Silverado 1500 2WD / 4WD - w/Rancho® RS6583 or RS6583B System - 4" Lift ---1999-2007 Silverado 1500 4WD (Classic)- 5"/6" Lift ---1999-2004 Silverado 2500 4WD (up to 8600 GVW) w/ Rancho® RS6549-RS6550 or RS6550B System - 4" Lift ---2001-2010 Silverado 2500HD 2WD / 4WD - (9200 GVW) w/ Rancho® RS6548 or RS6548B System - 4" Lift ---2005-2007 Silverado 1500HD 4WD Crew Cab w/Rancho® RS6550B System —Exc. Electronic Ride Control - 4" Lift ---2005-2007 Silverado 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift ---2001-2003 Silverado 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift ---2001-2003 Silverado 1500HD 4WD Crew Cab w/Rancho® RS6550 System —Exc. Electronic Ride Control - 4" Lift ---2014-2017 Sierra 1500 2WD/ 4WD - w/Rancho® RS66308B or RS66309B System - 4.5" Lift ---2014-2017 Sierra 1500 2WD / 4WD - w/ Rancho® RS66301B or RS66302B System - 6" Lift ---2007-2013 Sierra 1500 4WD w/ Rancho® RS6583 or RS6583B System - 4" Lift ---1999-2007 Sierra 1500 4WD (Classic) — Exc. 1500HD & Electronic Ride Control - 5-6" Lift ---2001-2004 Sierra 2500 4WD (up to 8600 GVW) w/Rancho® RS6550 or RS6550B Systems - 4" Lift ---1999-2000 Sierra 2500 4WD (up to 8600 GVW) w/Rancho® RS6549 System - 4" Lift ---2001-2003 Sierra 1500HD 4WD w/ Rancho® RS6550 or RS6550B Systems — Exc. ZX3 Electronic Ride Control - 4" Lift ---2001-2003 Sierra 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift ---2005-2007 Sierra 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift ---2005-2007 Sierra 1500HD 4WD w/ Rancho® RS6550 or RS6550B Systems — Exc. ZX3 Electronic Ride Control- 4" Lift ---2001-2010 Sierra 2500HD 2WD (9200 GVW) — Exc. Autoride & Air Leveling - 4" Lift ---2001-2010 Sierra 2500HD 4WD (9200 GVW) w/Rancho® RS6548 or RS6548B Systems - 4" Lift ---2003-2009 Hummer H2 w/Rancho® RS6556 or RS6557 Systems - 4" Lift ---2002-2006 Avalanche 2500 2WD / 4WD -w/Rancho® RS6551B System - 4" Lift ---2006-2008 Ram 1500 4WD w/ Rancho® RS6581B System w/o Mega Cab - 4" Lift ---2002-2005 Ram 1500 4WD w/ RS6572, RS6572B, RS6573 or RS6573B - 4" Lift

Rancho RS5000X Rear Shock Absorber Set For Silverado / Sierra / Ram / Hummer H2

The core of this new and innovative shock from Rancho® is the unique rebound valving system and an advanced compression phase of the shock absorber. This proprietary process developed by the ride engineers at Rancho will elevate the overall handling and performance of your vehicle on and off-road.

Progressive Engagement Valving

The Rancho RS5000X series design includes progressive rebound and compression discs. At lower speeds or in the earlier stages of the shock’s travel, an eccentric disc in the valve shim stacks will engage the valving at lower frequencies, helping to control the energy of motion as the cycle of the shock increases or decreases in its action. When hitting a pothole, off-road trail obstacle or similar activity, Rancho’s Progressive Engagement Valving allows for early flow of fluid, helping to reduce harsh initial impacts and to control the flow of fluid in a progressive, gradual manner through the valving. During on- or off-road driving activities like washboarding or when travelling a rough fire road, the early flow of fluid helps to minimize a “rough” ride as the piston movement is able to glide through the initial travel motion of the shock with minimal ground impact or force. If needed, the Progressive Engagement Valving will further engage to maintain control and stability.

Tuned Compression Control Valve

The Tuned Compression Control Valve is a custom-tuned, clamped disc base valve that regulates fluid transfer during the shock’s compression cycle to help absorb impacts without disc flutter and to help maintain vehicle control in virtually any environment. The precision-tuned shim stacked valving allows the motion of the shock to work in harmony with the vehicle during on- and off-road driving.

Enlarged 2-1/4-inch Twin Tube Body

The RS5000X series features a 2-1/4-inch diameter shock body. A larger shock body allows for increased fluid capacity to operate cooler and to increase vehicle control and performance at varying speeds and terrains. The RS5000X series combines a larger shock body with all-weather fluid, allowing the shock to withstand internal temperatures between -40 and 248 degrees Fahrenheit.

Gas Pressurization of Shock

Each RS5000X shock is gas pressurized to 150 PSI.* The twin tube, gas pressurized shock has a variety of advantages including minimizing air-to-oil mixture that can cause foaming and shock fade. Gas pressurization also provides a mild boost of spring rate to the vehicle.

16 mm Nitro-Carburized Rod

Every Rancho RS5000X shock piston rod is strengthened through a nitro-carburizing process. From increased scuffing resistance to additional protection against corrosion, the process enhances the shock’s overall durability. Nitro-carburizing also is more environmentally friendly than the chroming process

Full-Displaced 35 mm Bore

The RS5000X’s 35 mm bore helps to provide heightened control of shock motion due largely to the expanded piston area. Full-displaced compression valving allows the piston to displace more fluid than traditional rod displaced valving.

1-3/8-inch Diameter Sintered Iron Piston

The sintering process forms objects from powders using atomic diffusion. The powdered material is heated to just below its melting point, fusing all of the particles together to create the piston. This process brings increased structural conformity to each Rancho RS5000X piston.

Fitment Guide:

2014-2017 Silverado 1500 2WD / 4WD - w/Rancho® RS66308B or RS66309B System - 4.5" Lift
2014-2017 Silverado 1500 2WD / 4WD - w/Rancho® RS66301B or RS66302B System - 6" Lift
2007-2013 Silverado 1500 2WD / 4WD - w/Rancho® RS6583 or RS6583B System - 4" Lift
1999-2007 Silverado 1500 4WD (Classic)- 5"/6" Lift
1999-2004 Silverado 2500 4WD (up to 8600 GVW) w/ Rancho® RS6549-RS6550 or RS6550B System - 4" Lift
2001-2010 Silverado 2500HD 2WD / 4WD - (9200 GVW) w/ Rancho® RS6548 or RS6548B System - 4" Lift
2005-2007 Silverado 1500HD 4WD Crew Cab w/Rancho® RS6550B System —Exc. Electronic Ride Control - 4" Lift
2005-2007 Silverado 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift
2001-2003 Silverado 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift
2001-2003 Silverado 1500HD 4WD Crew Cab w/Rancho® RS6550 System —Exc. Electronic Ride Control - 4" Lift
2014-2017 Sierra 1500 2WD/ 4WD - w/Rancho® RS66308B or RS66309B System - 4.5" Lift
2014-2017 Sierra 1500 2WD / 4WD - w/ Rancho® RS66301B or RS66302B System - 6" Lift
2007-2013 Sierra 1500 4WD w/ Rancho® RS6583 or RS6583B System - 4" Lift
1999-2007 Sierra 1500 4WD (Classic) — Exc. 1500HD & Electronic Ride Control - 5-6" Lift
2001-2004 Sierra 2500 4WD (up to 8600 GVW) w/Rancho® RS6550 or RS6550B Systems - 4" Lift
1999-2000 Sierra 2500 4WD (up to 8600 GVW) w/Rancho® RS6549 System - 4" Lift
2001-2003 Sierra 1500HD 4WD w/ Rancho® RS6550 or RS6550B Systems — Exc. ZX3 Electronic Ride Control - 4" Lift
2001-2003 Sierra 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift
2005-2007 Sierra 1500HD 2WD w/ Rancho® RS6550 or RS6550B System - 4" Lift
2005-2007 Sierra 1500HD 4WD w/ Rancho® RS6550 or RS6550B Systems — Exc. ZX3 Electronic Ride Control- 4" Lift
2001-2010 Sierra 2500HD 2WD (9200 GVW) — Exc. Autoride & Air Leveling - 4" Lift
2001-2010 Sierra 2500HD 4WD (9200 GVW) w/Rancho® RS6548 or RS6548B Systems - 4" Lift
2003-2009 Hummer H2 w/Rancho® RS6556 or RS6557 Systems - 4" Lift
2002-2006 Avalanche 2500 2WD / 4WD -w/Rancho® RS6551B System - 4" Lift
2006-2008 Ram 1500 4WD w/ Rancho® RS6581B System w/o Mega Cab - 4" Lift
2002-2005 Ram 1500 4WD w/ RS6572, RS6572B, RS6573 or RS6573B - 4" Lift