The new 2021 Ram Heavy Duty is now offering the highest torque rating for a diesel truck and a segment-leading gooseneck towing capacity, thanks to the updated Cummins diesel engine under the bonnet.

For 2021, the high-output Cummins 6.7-liter inline-six diesel features higher boost pressure from the variable geometry turbocharger and a flow rate increase in the fuel delivery system to produce an additional 75 lb-ft of torque for a total of 1,075 lb-ft. Ram didn’t disclose any horsepower figures but last year’s model offered 400 HP.

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The 2021 updates also include an upgrade to the rear portion of the Ram Heavy Duty’s frame, which is made out of fully boxed rails and the rear-axle cross member and can feature a fifth wheel and a gooseneck hitch, to accommodate for the increased towing capacity.

The 2021 RAM Heavy Duty features a best-in-class 37,100 lbs fifth-wheel towing capacity, which was also made possible by a new in-house hitch design, beating the Ford F-Series Super Duty and its measly 37,000 lbs. This allows the Ram 3500 to haul the heaviest travel trailers according to the company. The tow rating for a conventional hitch is 23,000 lbs.

The optional hardware for the fifth-wheel and gooseneck is fully integrated into the production box floor, and include fifth-wheel pucks, gooseneck bolt plates, and gooseneck center castings, as well as a 7-pin connector and a 4/7-pin trailer connector.

Ram has also added a new digital rearview mirror that shows video in real-time from its rear-facing camera and can be switched to a classic reflective mirror when turned off. Customers can also opt for an external power source, which is located at the left rear corner of the bed and features a 400W inverter and a water-resistant lid for the plug.

The 2021 Ram Heavy Duty pickup trucks will arrive at dealerships across the US this month.