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That’s why we built the BIG BORE XD Steering Gear—a heavy-duty
oversized tires
O‑ring‑sealed cap—so it drops in
Weld-on options available for custom setups
We upgraded the stock 70 mm piston to a beefy 80mm for more torque
BIG BORE XD® Steering System – Ford Super Duty (2018–2025) Ford-F250-F350-4wd-Superduty-2000 That’s why we built theWhen youve got a Ford F 450 or F 550 Super Duty loaded down with gear, oversized tires, or a job to do, factory steering just doesnt cut it. PSCs BIG BORE XD line is built to handle the weight, the terrain, and the abusewithout making you fight the wheel. Whether youre looking for a Cylinder Assist upgrade or a full DDS system, these kits are made for trucks that work hard and steer harder.