King Shocks 3.5-Inch Rear Bypass Shocks for 2021-2026 Ford F-150 Raptor

Add heat capacity and bottoming control for sustained rough-terrain pace

King Shocks 37001-102 replaces the electronic rear dampers with a mechanically adjustable bypass pair engineered for third-generation Raptor and Raptor R trucks. Large bodies, one-inch shafts, and external finned reservoirs support consistent damping while separate bypass zones let the suspension respond progressively through its travel.

Key Features

• Exact 37001-102 rear pair for the listed Raptor applications
• Fully adjustable four-tube bypass design for compression and rebound tuning
• Built-in bump zone for additional bottoming control
• 3.5-inch shock bodies for increased fluid capacity
• One-inch-diameter shafts
• External 3.5-inch finned reservoirs made from extruded 6061-T6 aluminum
• Vehicle-specific dynamometer and real-world tuning
• Fully rebuildable, serviceable, and tunable construction

Fitment

Specifications

What's Included

• Two King Shocks 37001-102 side-specific rear bypass shocks
• Left reservoir bracket 33403-104
• Right reservoir bracket 33403-105
• King hardware kit KH02-237
• Off-Road Research damper interface and unrelated bump-stop components are not included

About King Shocks

King Shocks develops rebuildable off-road dampers using large fluid volumes, precision-machined components, and application-specific testing. Its bypass shocks use position-sensitive damping zones and external reservoirs to manage wheel motion and operating temperature under demanding use.

Related Parts

• Off-Road Research damper interface specified for this non-live-valve conversion
• King service oil, seals, and nitrogen-service parts matched to the exact shock configuration
• Factory mounting hardware when inspection shows the original fasteners should not be reused

FAQ

It is a matched pair of rear 3.5-inch four-tube bypass shocks with external finned reservoirs for the verified Ford Raptor applications below.

King lists 2021-2026 Ford F-150 Raptor and Raptor R 4WD models.

The kit contains two side-specific rear bypass shocks, two side-specific reservoir brackets, and the specified installation hardware.

The four-tube bypass design provides external compression and rebound adjustment, while the built-in bump zone adds bottoming control.

No. The original electronic shock wiring is disconnected during installation, and an exact-product retailer states that an Off-Road Research damper interface is required and sold separately.

King warns that the shocks do not fit most aftermarket bump-stop kits and that modifications may be required, so the installed bump-stop system must be checked first.

Yes. King describes the shocks as fully rebuildable, serviceable, and tunable.

King warrants its shock products against manufacturing defects for 90 days from the purchase date, subject to the current published exclusions.

Installation Instructions

1. Confirm the truck year, Raptor configuration, four-wheel-drive system, and installed bump-stop system before disassembly.
2. Verify the sealed kit label shows manufacturer part number 37001-102 and compare the contents with King's INS-F031 parts list.
3. Park on level ground, chock the front tires, raise the rear, support the frame and axle with rated stands, and remove the rear tires.
4. Disconnect each factory shock wire at the frame connector, release the cable clip, and remove the original rear shocks.
5. Install the side-specific reservoir brackets with each taller end toward the rear and each bracket parallel to the bed pinch seam.
6. Install the side-specific shocks with each reservoir hose toward the frame, then torque the upper and lower factory mounting hardware to Ford specifications.
7. Seat each finned reservoir in its bracket channel, install the retaining clips and supplied screws, and confirm the clips fully engage the reservoir grooves.
8. Verify hose, reservoir, tire, exhaust, bump-stop, and suspension clearances through the available travel before reinstalling the wheels.
9. Lower the truck, confirm all hardware is tight, and recheck shock, reservoir, and wheel fasteners after 100 miles and periodically thereafter.

California Proposition 65 Warning: Motor vehicle parts can expose you to chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling and follow applicable safety procedures.