Cummins Tier 4 Final Four-Cylinder Engines

Four-cylinder product line spans from 49 to 173 hp and is fully integrated with exhaust aftertreatment systems designed and manufactured by Cummins Emission Solutions

Cummins Inc.
QSF2 8 QSB4 5 Hi Tier4 56cc8cc603c1b

Cummins' full Tier 4 Final four-cylinder product line, including the QSF2.8 (49 to 74 hp), QSF3.8 (74 to 130 hp) and QSB4.5 (113 to173 hp) offer simplified technology that allows for compact installation packages, making them well-suited for space-constrained construction and material-handling equipment.

  • Fully integrated with exhaust aftertreatment systems designed and manufactured by Cummins Emission Solutions
  • Aftertreatment size and technology can be precisely matched to engine output and intended equipment type


Fill out the form below to request more information about Cummins Tier 4 Final Four-Cylinder Engines
Latest in Diesel Engines
First-to-last-pass accuracy
Sponsored Content
First-to-last-pass accuracy
July 1, 2025
Western Global's DEF550 offers a rugged and durable DEF tank solution that is engineered to withstand the harsh environments of rental, construction and fuel distribution operations.
26 Products to Help You Master Fleet Maintenance
March 24, 2025
First-to-last-pass accuracy
Sponsored Content
First-to-last-pass accuracy
July 1, 2025
The new engine being offered is a Cummins B6.7 with up to 325 hp. The new rear axle is designed for a Gross Axle Weight Rating (GAWR) of up to 23,000 lbs.
Mack Trucks Announces New Rear Axle and Engine for MD Series
March 22, 2025
Related Stories
STAGE V VISION Badge 56a1038f1a74d
Diesel Engines
Cummins Sets the Stage for bauma 2016 with Ultra-clean Engines
John Iain Barrowman MBE, Cummins Vice President - High-Horsepower Operations
Diesel Engines
Cummins VP Recognized by Queen for Contributions to British Industry
Clean Diesel Photo 55e61172b9dfd
Diesel Engines
Hydrotex Introduces Nationwide Clean Diesel Solutions
The Metric That Reveals Your Energy Costs
Sponsored Content
The Metric That Reveals Your Energy Costs
More in Diesel Engines
Equipment
Yanmar USA
Screenshot 2025 06 24 103724
Sponsored Content
Designed to Perform. Built to Endure.
BKT USA, Inc.
BKT’s EARTHMAX SR 41 is the ideal choice for articulated dump trucks, loaders, and dozers featuring an all-steel structure and special block pattern. It delivers outstanding puncture resistance, extended service life, and extraordinary operator comfort.
Designed to Perform. Built to Endure.
Diesel Engines
Isuzu Engines Celebrates 50 Years
Isuzu Motors America
This year, 2025, marks 50 years of powering the construction, equipment rental, and off-road equipment markets for Isuzu.
Black Gold Logo
Fleet Maintenance
26 Products to Help You Master Fleet Maintenance
Don't let equipment performance problems slow productivity on your jobsite. Learn how to overcome these issues with Equipment Today's roundup of the latest fleet maintenance products available to help contractors refine maintenance operations.
Western Global's DEF550 offers a rugged and durable DEF tank solution that is engineered to withstand the harsh environments of rental, construction and fuel distribution operations.
Equipment
Equipment Today Releases 2025 Annual Equipment Showcase
Designed to highlight hundreds of next level solutions for challenge construction jobsites, this year's showcase delivers the top equipment solutions in eight main categories, all aimed at improving your business and its jobsite operations.
Equipment Today's Annual Equipment Showcase highlights hundreds of today's latest product releases in earthmoving, attachments, lift equipment, worksite equipment, fleet maintenance, trucks and transportation, roadbuilding, and technology.
Trucks & Accessories
Mack Trucks Announces New Rear Axle and Engine for MD Series
Mack Trucks Inc.
When paired with the 325 hp engine rating and the Allison 3000RDS transmission, the Mack MD is now capable of increased towing capacity if the customer has a trailer.
The new engine being offered is a Cummins B6.7 with up to 325 hp. The new rear axle is designed for a Gross Axle Weight Rating (GAWR) of up to 23,000 lbs.
Sustainability
Top 3 Things to Understand About Environmental Funding and Emissions Regulations
Engine Technology Forum
The changes in emissions regulations under the new administration come with hesitance and apprehension for many companies and contractors.
The uncertainty of the follow-through of previous regulations is gripping many industries, especially the construction and trucking industries.
Other Components
RoadFlex and Konexial Collaborate to Improve Fleet Fuel Risk Management
RoadFlex
RoadFlex and Konexial have teamed up to create an integrated fuel management solution designed to help fleets reduce costs, prevent fraud, and optimize operational efficiency.
The RoadFlex-Konexial partnership delivers a next-generation fuel management solution that ensures fleets stay ahead in an increasingly competitive industry.
Trucks & Accessories
3 Evolving Trends Shaping the Future of Work Trucks at WTW 2025
NTEA | The Association for the Work Truck Industry
Here is a round-up of just a few of the trends we saw at Green Truck Summit.
The Green Truck Summit at Work Truck Week 2025 was able to highlight and explain some of the emerging trends in the sustainable and technological sectors of the industry.
Dealers, Service Centers
Volvo Trucks North America Unveils Volvo D13 Variable Geometry Turbo Engine
Volvo Trucks North America
The new Volvo D13 VGT engine will be standard in the all-new Volvo VNR and customers will also be able to select in the all-new Volvo VNL day cab.
The Volvo D13 VGT engine is now available for order in the all-new Volvo VNR and the all-new Volvo VNL models.
Fleet Maintenance
The Smartest Operators Register Their Engines — Here’s Why
John Deere
Engine registration isn't just a formality; it's an investment in your equipment's future. Discover the value of this often-overlooked step.
John Deere Engine Registration V2 67bcfaea4cf43
Diesel Engines
Why Ammonia Engines Haven't Taken the Lead Yet
Although there is an incentive to improve the ammonia engine and fuel capabilities and to create a better ammonia engine option, it has not been easy. Ammonia still has a way to go before it can be widely used in engines.
Although ammonia has not been fully nailed down as a fuel just yet, there is ongoing testing and research occurring to find out whether ammonia should be one of the top alternative fuels out there.
Excavators
Volvo Adds Hybrid Technology to New-Gen Excavators
Volvo Construction Equipment
Volvo's new-gen hybrid models ranging from 26 tons to 50 tons include five different excavators.
These new models deliver up to 20% better fuel efficiency than the previous series’ conventional models and a 15% reduction in CO2 emissions.
Page 1 of 55
Next Page