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When you’ve got a Ford F-450 or F-550 Super Duty loaded down with gear, oversized tires, or a job to do, factory steering just doesn’t cut it. PSC’s BIG BORE XD line is built to handle the weight, the terrain, and the abuse—without making you fight the wheel.
Whether you’re looking for a Cylinder Assist upgrade or a full DDS® system, these kits are made for trucks that work hard and steer harder.
Features
- Improved Steering Control: Helps reduce unwanted steering feedback and provides more consistent vehicle control.
- Reduced Steering Effort: Engineered to improve steering performance on vehicles equipped with larger tires, axle swaps, and other heavy-duty modifications.
- Built for Demanding Applications: Components are designed for off-road use, towing, work trucks, and other severe-duty environments.
- Complete Steering System: Includes components engineered to work together for proper fitment, performance, and reliability.
Specifications
- Part Number: SG756R
- BIG BORE XD Steering Gear with PSC Tuned Valving
- DDS Through-Shaft Dynamic Damping Stabilizer (DDS System only)
- Pre-Assembled Hoses with High-Heat Fire Sleeves
- PSC Billet Aluminum Ultra Flow Cylinder Assist Tower
- Integrated Skid Plate System (DDS System only)
- Offset DDS Clamp for OEM Tie-Rod
- 100% New Components - No Core Charge
- OEM cross reference: Ford F-550 Direct Replacement - SG756R
Installation Notes
- Ideal for: Off-roaders and overlanders, Tow rigs and haulers, First responder and commercial fleet trucks, Builders who want steering that works as hard as the truck does
- Recommended for: Oversized tires, Lift kits, High-GVW conversions, Off-road, tow, and fleet builds
Fitment
- 2018-2025 F-550 Super Duty 4WD
- 2018-2022 F-450 Super Duty 4WD (Factory Dana 60 front axle required)
What’s Included
BIG BORE XD Cylinder Assist Steering Gear - Ford F-550 Super Duty (2018-2024)
- BIG BORE XD Gear with PSC Tuned Valving
- Cylinder Assist Tower
- Pre-Assembled Hoses
- Mounting Brackets and Hardware
BIG BORE XD DDS Steering System - Ford F-450/F-550 Super Duty (2018-2025)
- BIG BORE XD Gear with PSC Tuned Valving
- DDS Through-Shaft Stabilizer
- Cylinder Assist Tower
- Pre-Assembled Hoses with Fire Sleeves
- Integrated Skid Plate
- Offset DDS Clamp
- Mounting Brackets and Hardware