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One of the most versatile diesel engines ever created, the 4BT Cummins has earned a dedicated following among diesel enthusiasts. Compact yet powerful, the Cummins 4BT is a 3.9L, inline four-cylinder engine that’s easy to swap into vehicles with limited engine bay space. With the right upgrades, this engine delivers impressive performance and fuel efficiency, often reaching up to 40 miles per gallon—a feat for any diesel.
The 4BT Cummins engine is known for its rugged design and adaptability, which make it a favorite in various applications, from Jeeps and trucks to custom off-road rigs. At Diesel Power Products, we stock a comprehensive range of parts to help you get the most out of your 4BT Cummins, whether you're after a straightforward swap or looking to boost its power output.
The Cummins 4BT’s compact size and durability make it a popular choice for engine swaps and commercial applications alike. Here’s a quick rundown of the 4BT Cummins engine specs:
With a high compression ratio and turbocharging, the 4BT Cummins strikes a balance between performance and fuel efficiency. These specifications make it a reliable choice for both light-duty and custom applications.
The 4BT Cummins 3.9 has earned a reputation not only for its compact size and reliable power but also for the unique performance it brings to various vehicles. Originally designed for commercial use, this four-cylinder diesel engine found a second life in vehicle swaps and custom builds due to its versatility and impressive torque.
Enthusiasts prize the 4BT for its adaptability—it’s small enough to fit into vehicles where larger engines won’t, and rugged enough to handle challenging terrain and tough tasks. For example, one of our favorite in-house builds featured a 4BT Cummins swap in a Jeep JK. Outfitted with additional off-road enhancements, this Jeep handled everything from daily commutes to trail adventures with ease, thanks to the 4BT’s reliable torque and fuel efficiency.
From pickups to SUVs and even custom off-road rigs, the 4BT Cummins 3.9 transforms each vehicle with a blend of practicality and diesel power, providing the durability and fuel savings that make it an exceptional choice for those who need both capability and efficiency.
Diesel Power Products offers a wide range of parts and upgrades tailored specifically for the 4BT Cummins. From tuners to cold air intakes, exhausts, and fuel systems, we have everything you need to enhance your engine’s performance and reliability. Our team of diesel experts is here to help you find the perfect parts for your build, ensuring that your 4BT Cummins performs at its best for years to come.
Disclaimer:
Diesel Power Products is not affiliated with Cummins or any of its subsidiaries or related companies. Unless a product is specifically identified as a Genuine Cummins product that has not been remanufactured, modified, or refurbished, Cummins makes no representation or warranty about the product and has not authorized, tested, or approved the parts for use in genuine Cummins brand products.
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