Pierce to offer PACCAR MX-13 big block engine on custom chassis

Pierce Manufacturing and PACCAR have collaborated to make MX-13 big block engines exclusively available to the fire service on Pierce Arrow XT, Enforcer and Velocity chassis.

Pierce and PACCAR have collaborated to offer MX-13 big block engines exclusively on Pierce custom chassis.
Pierce and PACCAR have collaborated to offer MX-13 big block engines exclusively on Pierce custom chassis. (Courtesy photo)

APPLETON, Wis. — Pierce Manufacturing Inc., an Oshkosh Corporation company, announced today that it has collaborated with PACCAR to make the 12.9 liter MX-13 big block engine exclusively available to fire departments on Pierce Arrow XT, Enforcer and Velocity custom chassis. Known as a global leader in the design and manufacture of diesel engines, PACCAR operates technologically advanced engine research and development centers in Mt. Vernon, Washington and Eindhoven, the Netherlands, and a world-class engine manufacturing facility in Columbus, Mississippi, which will produce the MX-13 big block engines supplied for integration into Pierce’s custom fire apparatus.  

“As we bring together two premium brands, we are confident the synergy between our companies and our collaborative commitment to quality will give firefighters ultimate confidence in their Pierce apparatus designed to serve their communities,” said Jim Johnson, president of Pierce Manufacturing.  

Available in 510 HP with 1,850 LB-FT of torque, the PACCAR MX-13 big block engine incorporates industry-leading design features that help keep you running with outstanding fuel economy, low maintenance, and great return on investment.

Other MX-13 engine features include:

  • Quiet and smooth operation for exceptional out-of-the-gate performance
  • Compacted graphite iron castings provide a lightweight and durable design
  • High-pressure common rail fuel injection helps optimize combustion
  • Weatherproofed and encapsulated wiring to protect against cable rubs

Notably recognized for its prominent Kenworth, Peterbilt, and DAF truck brands, PACCAR’s exclusive Pierce fire apparatus engines may be serviced at over 900 maintenance centers across North America. Not only does the PACCAR MX-13 big block engine offer easy-to-access replaceable maintenance parts, customers will also receive a five-year, 100,000-mile warranty.

“PACCAR is excited to partner with Pierce, the premier fire truck provider in North America, to supply firefighters and their fire trucks with a superior diesel engine,” said Landon Sproull, PACCAR vice president.  “PACCAR engines deliver exceptional durability, fast acceleration and quiet operation, which are top priorities for emergency services.”

To learn more about Pierce and PACCAR’s MX-13 big block engine, visit

About Pierce Manufacturing
Pierce Manufacturing Inc., an Oshkosh Corporation [NYSE: OSK] company, is the leading North American manufacturer of custom fire apparatus. Products include custom and commercial pumpers, aerials, rescue trucks, wildland trucks, mini pumpers, elliptical tankers, and homeland security apparatus. In addition, Pierce designs its own foam systems and was the first company to introduce frontal airbags and the Side Roll Protection system to fire apparatus. To learn more about Pierce, visit

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