Caterpillar designed Tier 4 Interim products with Tier 4 Final standards in mind. By planning ahead, we were able to minimize design changes and deliver the reliability and performance you demand. Every Tier 4 Final engine is equipped with a combination of proven electronic, fuel, air and aftertreatment components, based on engine size, application and the geographic location in which it will work. Applying proven technologies systematically and strategically lets us meet your high expectations for productivity, fuel efficiency, reliability and service life.

Tier 4 Products


This video provides an in-depth look at the technology used on Cat® Tier 4 Final / Stage IV engines.

Engine Electronics

The electronics used in Cat® Tier 4 Interim/ Stage IIIB engines are more powerful and robust than ever

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Fuel Systems

Caterpillar engineers specified fuel systems based on the power and performance demands for each engine.

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Air MAnagement

Innovative air-management systems optimize airflow and enhance power, efficiency and reliability.

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