USED 6.7 CUMMINS ENGINE FOR SALE

$6,499.00

Product Overview & Specifications

In Stock, Cummins ISB 6.7L Engines Available
Free Shipping to All 50 States via Freight Pallet, 7 to 14 Business Days
Generation Verified (Gen 1 2007.5 to 2012 / Gen 2 2013 to 2018 / Gen 3 2019 to 2023 / Gen 4 2024 plus)
Fuel System Identified (Bosch CP3 vs Bosch CP4.2)
Donor Vehicle Confirmed (Ram 2500 / 3500 / 4500 / 5500 or Freightliner M2)
Emissions Equipment Noted (DPF / EGR only vs DPF / EGR / SCR / DEF)
Power Rating Documented (Standard Output or High Output)
Compression Tested Across All 6 Cylinders
Oil Pressure Verified
VGT Turbocharger Actuator Condition Assessed
HPCR Injector Function Confirmed
EGR Cooler Inspected (Known Wear Point on Gen 1)

100% Fitment Assistance

15 Days Replacement Warranty

Free & Fast Shipping

Category: Engine

Description
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Used 6.7 Cummins Engine for Sale: Power and Reliability for Your Heavy-Duty Truck

Looking for a used 6.7 Cummins engine for sale? Look no further than the robust power and reliability of this renowned inline-six turbocharged diesel engine from Cummins Inc. Whether you’re replacing a worn engine in your Ram 2500, 3500, 4500, or 5500 heavy-duty truck, completing a Freightliner Business Class M2 service rebuild, or sourcing a powerplant for a custom diesel swap project, the 6.7 Cummins is the heart of Dodge and Ram heavy-duty diesel pickup performance since mid-year 2007. Built to handle heavy loads, demanding work cycles, and the punishment of commercial duty cycles, this engine is a favorite among diesel truck enthusiasts, fleet managers, and contractors alike.

Engine Overview: Cummins ISB 6.7L

The 6.7L Cummins ISB turbo diesel engine is renowned for its power output, robust construction, and the legendary durability that has made Cummins B-series engines the choice of Dodge / Ram heavy-duty trucks for decades. Compatible with Dodge Ram 2500 and 3500 (2007.5 through current), Ram 4500 and 5500 chassis cab (2008 through current), and Freightliner Business Class M2 medium-duty trucks, these engines deliver impressive performance across multiple generations. With stock power outputs ranging from 350 horsepower / 610 lb-ft (early 2007.5 to 2010 base trucks) to 420 horsepower / 1,075 lb-ft (current High Output variants), a used 6.7 Cummins engine delivers serious heavy-duty diesel capability.

Critical Buyer Information: The 6.7 Cummins Has Four Distinct Generations

Before ordering, it’s essential to understand which generation of the 6.7 Cummins you need. The engine has gone through four distinct generations with significant differences in fuel system, emissions equipment, power output, and reliability characteristics:

Generation 1: 2007.5 to 2012

Fuel system: Bosch CP3 high-pressure pump (proven reliable design)

Emissions: DPF + EGR only (NO DEF / SCR system yet)

Power output: 350 HP / 610 to 800 lb-ft

Common issues: EGR cooler failures, DPF clogging, CP3 generally reliable

Years: 2007.5, 2008, 2009, 2010, 2011, 2012 model year Ram 2500 / 3500

Generation 2: 2013 to 2018

Fuel system: Bosch CP3 high-pressure pump (still reliable)

Emissions: DPF + EGR + SCR + DEF (Diesel Exhaust Fluid) system added for 2013+

Power output: 350 to 385 HP / 660 to 865 lb-ft (HO variant available)

Aisin AS69RC transmission paired with HO 385 HP / 865 lb-ft configuration

Common issues: DEF system sensor failures, otherwise generally reliable

Years: 2013, 2014, 2015, 2016, 2017, 2018 model year Ram

Generation 3: 2019 to 2023

Fuel system: Bosch CP4.2 high-pressure pump (NOTORIOUS catastrophic failure history when exposed to fuel contamination or water in fuel)

Emissions: DPF + EGR + SCR + DEF

Power output: 370 to 400 HP / 850 to 1,000 lb-ft (HO variant)

Common issues: CP4.2 fuel pump catastrophic failures can send metal debris through the entire fuel system requiring complete fuel system replacement; aftermarket CP3 conversion kits popular as preventive measure

Years: 2019, 2020, 2021, 2022, 2023 model year Ram

Generation 4: 2024 to Current

Fuel system: Current production system

Emissions: Current EPA / CARB compliant

Power output: Up to 420 HP / 1,075 lb-ft (HO variant)

Years: 2024 plus model year Ram

When ordering, match the generation to your truck. Installing a Generation 3 engine (CP4.2) into a Generation 1 truck (designed for CP3) requires fuel system modifications.

Why Buy the 6.7 Cummins Engine?

Turbocharged Power: Offers substantial horsepower and torque output across all generations, ideal for towing heavy trailers, hauling commercial loads, and powering chassis cab work trucks.

Inline-Six Configuration: The classic Cummins B-series I6 configuration provides excellent torque delivery characteristics, smooth power delivery, and the legendary durability that has made Cummins engines the choice of Dodge / Ram heavy-duty trucks for over 30 years (since the original 5.9L 12-valve in 1989).

Variable Geometry Turbocharger (VGT): Provides precise boost pressure control across the RPM range, enhancing low-end torque for improved acceleration and towing capability while delivering high-RPM power for highway passing.

High-Pressure Common Rail (HPCR) Fuel Injection: Delivers fuel at extreme pressures (over 30,000 PSI) for optimized combustion efficiency, reduced emissions, and improved fuel economy versus older mechanical injection systems.

Cast Iron Block and Head: Built for durability under heavy commercial duty cycles. Many 6.7 Cummins engines exceed 500,000 miles in commercial service with proper maintenance.

Aftermarket Support: Extensive availability of performance parts, tuners, exhaust systems, intake systems, EGR / DPF delete kits (for off-road and competition use), and aftermarket fuel system upgrades.

Proven Track Record: Backed by Cummins’ reputation for reliability and longevity, with the B-series family having powered Dodge / Ram trucks since 1989 (B5.9 12-valve, B5.9 24-valve, then B6.7).

Smart Diesel Exhaust Fluid (DEF) System (2013 plus): Optimizes DEF consumption for efficient emissions control without compromising engine power. Note: Generation 1 (2007.5 to 2012) engines do NOT have DEF / SCR systems.

Exhaust Brake (Optional): Integrated exhaust brake helps manage vehicle speed on steep downhill grades, particularly valuable for towing heavy trailers, enhancing safety and reducing service brake wear.

Advanced Cooling System: Engineered to handle sustained heavy-duty operation under high ambient temperatures.

6.7 Cummins Engine Vehicle Applications

The Cummins ISB 6.7L is used in:

Primary Applications: Dodge / Ram Heavy-Duty Pickups

Dodge Ram 2500 (2007.5 to 2010 with Dodge branding, 2011 to current with Ram branding)

Dodge Ram 3500 (2007.5 to 2010 Dodge, 2011 to current Ram)

Ram 2500 (2011 to current)

Ram 3500 (2011 to current, including HO with Aisin AS69RC transmission)

Chassis Cab Applications:

Ram 4500 Chassis Cab (2008 to current) , medium-duty work truck

Ram 5500 Chassis Cab (2008 to current) , medium-duty work truck

Commercial Truck Applications:

Freightliner Business Class M2 (medium-duty commercial truck) , available with 6.7 Cummins ISB

Important Note: NOT Used in Class 8 Heavy-Duty Trucks

Despite some descriptions claiming compatibility with Freightliner Cascadia, Kenworth T680 / T880, and Peterbilt 567 / 579, the Cummins 6.7L ISB is a medium-duty engine. These Class 8 heavy-duty long-haul trucks typically use the larger Cummins ISX15 / X15 (15-liter) engine, not the 6.7L ISB. The 6.7 Cummins is appropriate for:

Medium-duty trucks (Class 4 to 7)

Heavy-duty pickup applications (Ram 2500 / 3500)

Chassis cab work trucks (Ram 4500 / 5500, Freightliner M2)

Some recreational vehicle applications (motorhomes, RVs)

Industrial / agricultural equipment

For Class 8 heavy-duty long-haul applications (Cascadia, T680, 579), you need the Cummins ISX15 / X15. Call (240) 301-0095 to inquire about ISX15 availability.

Emissions Compliance

All our used 6.7 Cummins engines for sale are sold with their original factory emissions equipment intact and adhere to EPA regulations. We include the necessary emissions system components (DPF, EGR system, and where applicable SCR / DEF system for 2013 plus engines) to ensure your truck remains compliant with current standards when properly installed.

Why Choose a Used 6.7 Cummins Engine?

Opting for a used 6.7 Cummins engine offers several advantages over alternatives:

Cost-effective alternative to new engines ($6,499 used vs $14,000 to $22,000 for new crate)

Cost-effective alternative to remanufactured units ($6,499 used vs $9,500 to $14,000 for reman)

Proven reliability and performance of the Cummins B-series platform

Wide availability of parts and aftermarket support for ongoing maintenance and performance upgrades

Potential for significant power upgrades through ECM tuning, intake / exhaust modifications, and (for off-road / competition use) emissions delete kits

Find Your Perfect 6.7 Cummins Engine Today

Whether you’re replacing a worn engine in your daily-driven Ram 2500, restoring a contractor work truck, or building a high-performance Cummins-powered project, our selection of used 6.7 Cummins engines for sale has you covered. With options spanning all four generations and both Standard and High Output variants, you’re sure to find the right engine for your truck.

Browse our inventory of 6.7 Cummins engines for sale now, or contact our team for personalized recommendations matching your specific year, body code, and trim. Experience the power and reliability of a Cummins diesel in your truck. Your journey to enhanced performance starts here!

aspiration	Turbocharged (Variable Geometry Turbocharger, VGT / Cummins Holset)
bore-x-stroke	4.21 inches x 4.88 inches
compression-ratio	16:1 to 18:1
cooling-system	Liquid cooled
electrical-system	12 volt
fuel-system	High-Pressure Common Rail (HPCR) with Bosch CP3 (2007.5 to 2018) or Bosch CP4.2 (2019 to current)
fuel-type	Ultra Low Sulfur Diesel (ULSD)
valvetrain	Overhead Valve (OHV) pushrod, typically 4 valves per cylinder
engine-type	Inline-six diesel
manufacturer	Cummins Inc. (Columbus, Indiana, USA)
Model	ISB 6.7L (also B6.7 in current Cummins nomenclature)
displacement	6.7 liters (408 cubic inches)
block-material	Cast Iron
cylinder-head-material	Cast iron
horsepower-range	350 to 420+ HP (varies by generation and SO / HO variant)
torque-range	075 lb-ft (varies by generation and SO / HO variant), 610 to 1
production-years	Mid-2007 (2007.5) to current production
predecessor	Cummins ISB 5.9L 24-valve (1998.5 to 2007 Dodge Ram heavy-duty)
compatibility	2007.5 to current Dodge / Ram 2500, 3500, 4500, 5500 plus Freightliner M2

FAQs

What makes the 6.7 Cummins engine popular among truck enthusiasts and fleet operators?

The 6.7 Cummins is renowned for its robust performance, high torque output, legendary B-series durability, and the Cummins Inc. reliability reputation built over 30 plus years of Dodge / Ram heavy-duty pickup applications. Key factors: – Inline-six configuration provides ideal torque delivery characteristics for towing and hauling – Cast iron block and head built for heavy-duty commercial duty cycles – Cummins B-series family heritage , the 6.7 is the latest evolution of the legendary B-series that started with the 1989 Dodge Ram 5.9L 12-valve – Wide aftermarket support , from ECM tunes to performance turbos to fuel system upgrades – Proven longevity , properly-maintained 6.7 Cummins engines routinely exceed 400,000 to 500,000 miles in commercial service

What are the four generations of the 6.7 Cummins?

This is the most important question for buyers. The 6.7 Cummins has gone through four distinct generations: Generation 1: 2007.5 to 2012 – Bosch CP3 fuel pump (reliable) – DPF + EGR only, NO DEF / SCR – 350 HP / 610 to 800 lb-ft – Common issues: EGR cooler failures, DPF clogging Generation 2: 2013 to 2018 – Bosch CP3 fuel pump (still reliable) – DPF + EGR + SCR + DEF (added 2013) – 350 to 385 HP / 660 to 865 lb-ft (HO variant) – Aisin AS69RC transmission with HO variant – Common issues: DEF sensor failures Generation 3: 2019 to 2023 – Bosch CP4.2 fuel pump (NOTORIOUS catastrophic failure history) – DPF + EGR + SCR + DEF – 370 to 400 HP / 850 to 1,000 lb-ft – Common issues: CP4.2 fuel pump catastrophic failures requiring complete fuel system replacement Generation 4: 2024 to Current – Current production – Up to 420 HP / 1,075 lb-ft (HO variant) Match the generation to your specific Ram truck year.

What’s the deal with the Bosch CP4.2 fuel pump failure issue?

The Bosch CP4.2 high-pressure fuel pump (used in 2019 plus 6.7 Cummins engines and other diesel applications) has a documented catastrophic failure mode. When the CP4.2 fails (often triggered by fuel contamination, water in fuel, or normal wear), it can send metal debris from the failed pump throughout the entire fuel system, contaminating injectors, fuel rails, fuel lines, and the fuel tank. The result is typically a complete fuel system replacement costing $8,000 to $15,000+ at a Ram dealer. The 2007.5 to 2018 6.7 Cummins used the more reliable Bosch CP3 pump which does not have this failure mode. Many 2019 plus Cummins owners install aftermarket CP3 conversion kits as a preventive measure. When buying a used 6.7 Cummins for a 2019 plus Ram, verify the fuel system condition carefully.

How does the Variable Geometry Turbocharger (VGT) benefit the 6.7 Cummins engine?

The VGT (Variable Geometry Turbocharger, also called Cummins Holset VGT) in the 6.7 Cummins adjusts the angle of vanes in the turbine housing to optimize boost pressure at different engine speeds. This delivers: – Strong low-end torque for towing and hauling at low RPM – High-RPM power for highway passing and merging – Reduced turbo lag versus traditional fixed-geometry turbochargers – Improved emissions through more precise air-fuel ratio control – Optional exhaust brake function when vanes are commanded closed at low load The Cummins Holset VGT actuator is a known wear point, particularly when the engine is operated heavily without proper warmup; we inspect VGT function on every 6.7 Cummins we sell.

What is the maintenance schedule like for the 6.7 Cummins engine?

Regular maintenance for the 6.7 Cummins: – Oil and filter changes every 7,500 to 15,000 miles (depending on duty cycle and oil specification) – Fuel filter replacement every 15,000 to 30,000 miles (critical for fuel system longevity) – Air filter replacement every 30,000 to 60,000 miles – Coolant flush every 60,000 to 100,000 miles with Cummins-approved ELC coolant – DEF fluid refill as needed (Gen 2 plus only, typically every 5,000 to 10,000 miles) – DPF regeneration (active and passive, monitor for excessive regen frequency indicating other issues) – Periodic inspections of cooling system, turbocharger boost, and exhaust system Following Cummins / Ram recommended service intervals helps maintain peak performance and the engine’s 400,000 plus mile potential.

How does the Smart Diesel Exhaust Fluid (DEF) system work in the 6.7 Cummins engine?

The Smart DEF / SCR system was introduced on the 2013 model year 6.7 Cummins (it is NOT present on 2007.5 to 2012 engines). The system monitors DEF (urea solution) levels and injection rate based on operating conditions, optimizing DEF consumption to ensure NOx emissions reduction while maintaining engine performance. Key points: – DEF is required for engine operation on 2013 plus engines , if you run out, the truck will derate and eventually refuse to start – DEF consumption is typically 2 to 3% of fuel use (a tank of DEF lasts approximately 5,000 to 10,000 miles) – DEF tank capacity is typically 5 to 7 gallons on Ram heavy-duty trucks – 2007.5 to 2012 engines do NOT have DEF , they used DPF and EGR only

Can the 6.7 Cummins handle aftermarket performance upgrades?

Yes, extensively. The 6.7 Cummins has one of the most active aftermarket support communities of any modern diesel engine. Popular upgrades include: – ECM tuning (mild Stage 1 tunes add 75 to 100 HP and 150 to 250 lb-ft without other modifications) – Cold air intake systems (S&B, AFE, K&N) – Performance exhaust systems (4 inch and 5 inch turbo-back kits) – Upgraded turbochargers (BorgWarner, Industrial Injection, FleeceForge) – Larger / improved injectors for higher fueling – Compound turbo setups for race-prepped builds (1,000 plus HP achievable) – Aftermarket transmission upgrades to handle the increased torque – CP3 conversion kits for 2019 plus engines (to eliminate CP4.2 failure risk) Tuned 6.7 Cummins engines routinely exceed 600 HP and 1,200 lb-ft, with extreme builds reaching 1,500 HP plus.

How does shipping work?

Free freight pallet delivery to all 50 US states. Typical transit 7 to 14 business days. The 6.7 Cummins is a heavy engine (approximately 1,100 lbs dry) requiring specialized freight handling.