KYB 565091 Shock Absorber - Rear

KYB MonoMax Rear Shock for Ford Super Duty

The KYB MonoMax 565091 is a heavy-duty rear suspension shock absorber built for Ford Super Duty trucks that work hard, tow, haul, or see rough road use. Its monotube design is made to deliver consistent control under load, with fitment for select Ford F-250 Super Duty and Ford F-350 Super Duty rear applications.

Key Features

• Heavy-duty monotube construction for improved handling and control
• Up to 40% more damping performance than standard shock absorbers
• Zinc-coated stainless steel piston ring for sealing in demanding conditions
• Rubber dust boot helps protect the shaft and seal area from dirt and debris
• Engineered to support vehicles with electronic safety systems such as ESC and ABS
• Rear shock absorber for lifted and standard suspension applications where listed

MonoMax Product Line Details

KYB MonoMax shocks are built for truck owners who need firmer damping and more stable suspension response than a conventional replacement shock. The MonoMax line is aimed at heavier-duty use, including towing, hauling, off-road driving, and lifted Ford truck setups where added control matters. Part number 565091 follows that approach with a large-bore monotube design and work-ready construction.

Detailed Description

KYB 565091 is a rear suspension shock absorber for select 1999-2016 Ford F-250 Super Duty and Ford F-350 Super Duty models. It is designed for applications that need more consistent damping under load, including rear shock replacement on standard suspension trucks and certain 2.5-inch lift setups. This part cross-references Monroe Shocks & Struts (e.g., 911267) for the same application. If you are searching for a rear shock for a Ford F-250 Super Duty or Ford F-350 Super Duty, KYB MonoMax 565091 provides a direct-fit option for the listed applications.

What It Helps Address

• Excessive rear-end bounce on Ford Super Duty trucks
• Reduced control when towing a trailer or carrying heavy cargo
• Shock fade during repeated heavy-duty driving
• Loose or unsettled ride quality on lifted rear suspension applications
• Dust and debris exposure around the shock shaft and seal area

Installation Notes and Fitment

Compatible With 2011-2016 Ford F-250 Super Duty, rear; 2008-2010 Ford F-250 Super Duty, rear; 1999-2007 Ford F-350 Super Duty, rear; 1999-2004 Ford F-250 Super Duty, rear; and 1999-2004 Ford F-350 Super Duty, rear. Additional listed applications include 1999-2004 Ford F-250 Super Duty rear lift replacement shocks for Rancho RS5012, RS9012, RSX17342, and Edelbrock 64203 with a 2.5-inch lift, plus the same lift-replacement coverage for 1999-2004 Ford F-350 Super Duty. Verify mount style and suspension configuration before installation; this shock uses an E2(12X38) lower mount and E1 upper mount.

Quality Assurance

KYB builds the MonoMax line as a heavy-duty monotube shock absorber with fade-resistant performance and work-focused construction. The zinc-coated piston ring and included dust boot support durability in harsh operating conditions, making KYB 565091 a practical replacement for demanding Ford Super Duty rear suspension service.