Built for punishing, high-load duty cycles, the Wagner SevereDuty SX777 Disc Brake Pad Set brings semi-metallic, carbon-based friction to a range of heavy Ford chassis. It installs as a direct-fit replacement for the listed applications, including the 1999-2004 Ford F-450 Super Duty, 1999-2004 Ford F-550 Super Duty, the 1999-2004 and 2006-2007 Ford F-53 Motorhome Chassis, and the 2002-2003 Ford E-550 (all engines). The catalog lists it for front or rear positions; use the Buyer's Guide tab to confirm your vehicle.
- Built tough: engineered and tested for fleets, police-pursuit use, and vehicles that see frequent stops, gear hauling, and heavy loads.
- Long life: semi-metallic carbon-based friction material engineered in-house for durable braking in the toughest applications.
- OE-style design: features OE-style shims, slots, and chamfers, with abutment clips included.
- Zero-copper formulation: uses Wagner's OE25 zero-copper friction formulation, validated with OE-style on-vehicle testing.
The set includes pad shims and abutment clips; premium stainless-steel hardware kits are included on key applications. It does not include a pad wear sensor. Quantity is one set per application, and for even, balanced braking it is best practice to replace the pads across an axle together as a matched set rather than one side alone. Made in the United States. FMSI: 7644-D777 · Manufacturer part number SX777.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Which vehicles does the SX777 fit?
Direct-fit for the listed Ford chassis: 1999-2004 F-450 and F-550 Super Duty, the 1999-2004 and 2006-2007 F-53 Motorhome Chassis, and the 2002-2003 E-550 (all engines). See the Buyer's Guide tab.
What friction material does it use?
It uses a semi-metallic, carbon-based friction material with Wagner's OE25 zero-copper formulation, designed for durable braking under heavy loads, frequent stops, and high heat.
Does it come with hardware?
It includes pad shims and abutment clips, and premium stainless-steel hardware kits are included on key applications. It does not include a pad wear sensor.
Is this a front or rear pad set?
It is cataloged for front or rear positions depending on the application. Use the Buyer's Guide tab to match the correct position to your vehicle.
Do I need to replace both sides?
This listing is for one pad set. For even, balanced braking, it is best practice to replace the pads across an axle together as a matched set rather than just one side.
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