2021 International® Prostar® Driving on the road for the night for sale in Westrux, Santa Fe Springs, California

Get Power & Efficiency with the International® A26 Big Bore Engine

A26

Built for Uptime and Backed by a Best-in-Class Warranty.

The International® A26 Engine is engineered with proven components that deliver optimal uptime and fuel efficiency in a lightweight design. This big bore engine has been relentlessly tested with hundreds of thousands of hours of dyno testing and millions of real-world test miles.

The A26 produces up to 475 HP and 1750 lb.-ft. of torque, yet is 600-700 lbs. lighter than traditional big-bore engines. At 2,299 lbs, it is the lightest engine in its class.

It features North America's first Class 7-8 Compacted Graphite Iron (CGI) crankcase design for greater strength, plus an all-new cylinder head and other refinements for up to a 5% fuel economy improvement over the engine it replaces.

Engine braking power is increased by up to 67% for confident braking performance, particularly at low- to mid-RPMs and at higher altitudes.

International® A26 Available for:

A26

Enginered With Efficient Muscle And Ready To Set a New Standard In Uptime.

Every Component Is Engineered to Maximize Uptime:a26 Engine Highlights

  • Larger piston pin, connecting rod and bushing deliver optimal load distribution for greater durability
  • Assembled camshaft features tool grade steel lobes for unsurpassed durability
  • Foamed wiring harnesses provide ease of service and chafe protection
  • Aluminum castings, stainless steel tubes, composite valve covers, and optional stainless steel oil pans provide long lasting corrosion protection
  • All high temperature fasteners include a permanent coating to prevent seizing, including fasteners for the exhaust manifolds, heat shields, and turbocharger

Fuel Efficiency - up to 5% Greater Fuel Economy Than the Engine It Replaces:

  • Variable Geometry Turbocharger efficiently delivers boost air pressure across a wide range of engine speeds, loads and elevation
  • 2500 bar High Pressure Common Rail (HPCR) fuel system produces maximum fuel injection pressure to reduce emissions and fuel consumption
  • Down speed calibration ratings reduce friction and parasitic losses
  • Class-leading lightweight design includes compacted graphite iron crankcase, shot peened aluminum flywheel housing, composite valve covers, and a hollow camshaft to reduce weight while maximizing payload capacity
  • Low fuel consumption at idle of 0.5 gallon of fuel per hour minimizes idling expense

Driver Appeal/Noise Reduction:

  • Variable Geometry Turbocharger boosts engine braking power by up to 67% for confident braking performance, particularly at low- to mid-RPMs and at higher altitudes
  • High-flow hand primer pump is relocated to allow quick and easy access
  • Sculpted crankcase and oil pan reduce noise and absorb vibration
  • HPCR fuel system delivers multiple injection events for smooth and extremely quiet operation

Note: Engine specifications are subject to change without notice. TAD17001 3/2019 ©2019 NAVISTAR Inc. All rights reserved. All marks are trademarks of their respective owners.

A26
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