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5.9L / 6.7L Diesel Engine Upgrades

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674 Results

Edge EvoHT2 Handheld Tuner: Fits Most GM / Ford / Dodge RAM Trucks

Edge EvoHT2 Handheld Tuner: Fits Most GM / Ford / Dodge RAM Trucks

Edge

Regular price $518.95 $499.95 4% off

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MBRP 4in Filter Back Cool Duals AL: Ram 2500 (13-21) / 3500 (13-24)
MBRP 4in Filter Back Cool Duals AL: Ram 2500 (13-21) / 3500 (13-24)

MBRP 4in Filter Back Cool Duals AL: Ram 2500 / 3500 13-26 6.7L Diesel/6.4L/5.7L

MBRP

Regular price $685.58 $554.99 19% off

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Liqui Moly Special Tec AA Motor Oil: Fits Most Dodge / Jeep / Ram Models
Liqui Moly Special Tec AA Motor Oil: Fits Most Dodge / Jeep / Ram Models
AEM DryFlow Air Filter: Dodge/RAM 2500/3500 2003-2012 5.9/6.7L Diesel
AEM DryFlow Air Filter: Dodge/RAM 2500/3500 2003-2012 5.9/6.7L Diesel
PPE Head Stud Kit: Ram 1998.5-2024 5.9L / 6.7L 24V High Yield
PPE Head Stud Kit: Ram 1998.5-2024 5.9L / 6.7L 24V High Yield
usa
PPE Head Stud Kit: Dodge Cummins 5.9L 12V (1989-1998)
PPE Head Stud Kit: Dodge Cummins 5.9L 12V (1989-1998)
usa
PPE Main Stud Kit: Dodge Ram (89-98)
PPE Main Stud Kit: Dodge Ram (89-98)
usa
PPE Head Stud Kit: Dodge Ram (98-24) 5.9L / 6.7L 24V
PPE Head Stud Kit: Dodge Ram (98-24) 5.9L / 6.7L 24V
usa
PPE Serpentine Belt: Ram 6.7L 2013-2018 w/ Dual Alternator
PPE Serpentine Belt: Ram 6.7L 2013-2018 w/ Dual Alternator
usa
Superchips F5 Flashpaq 50-State Legal Programmer: Fits Most Hemi Models

Superchips F5 Flashpaq 50-State Legal Programmer: Fits Dodge / Ram / Chrysler (98-13)

Superchips

Regular price $518.95 $499.95 4% off

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Superchips Dashpaq+ Performance Tuner: Fits Most Dodge / Ram / Chrysler Models 2003-2014
Superchips Dashpaq+ Performance Tuner: Fits Most Dodge / Ram / Chrysler Models 2003-2014

Superchips Dashpaq+ Performance Tuner: Fits Most Dodge / Ram / Chrysler Models 2003-2014

Superchips

Regular price $979.95 $922.95 6% off

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Flowmaster Pro Series Muffler: Dodge Ram 2500 / Ram 3500 97-07
Flowmaster Pro Series Muffler: Dodge Ram 2500 / Ram 3500 97-07
usa

Flowmaster Pro Series Muffler: Dodge Ram 2500 / Ram 3500 97-07

Flowmaster

Regular price $345.95 $306.95 11% off

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Flowmaster American Thunder Cat-Back Exhaust System: Dodge Ram 1500 (94-01) / Ram 2500 (94-02) / Ram 3500 (94-02)
usa

Flowmaster American Thunder Cat-Back Exhaust: Dodge Ram 1500 (94-01) / Ram 2500 / 3500 (94-02)

Flowmaster

Regular price $731.95 $675.95 8% off

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Flowmaster Direct Fit Catalytic Converter: Dodge Ram 1500 / Ram 2500 / Ram 3500 1994-1999
Flowmaster Direct Fit Catalytic Converter: Dodge Ram 1500 / Ram 2500 / Ram 3500 1994-1999
usa

Flowmaster Direct Fit Catalytic Converter: Dodge Ram 1500 / Ram 2500 / Ram 3500 1994-1999

Flowmaster

Regular price $575.95 $531.95 8% off

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Flowmaster 40 Series Delta Flow Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (843041)
Flowmaster 40 Series Delta Flow Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (843041)
usa

Flowmaster 40 Series Delta Flow Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (843041)

Flowmaster

Regular price $192.95 $170.95 11% off

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Flowmaster 50 Series HD Chambered Muffler (REAR): Fits Dodge Ram / Jeep Grand Cherokee (94-14)
Flowmaster 50 Series HD Chambered Muffler (REAR): Fits Dodge Ram / Jeep Grand Cherokee (94-14)
usa

Flowmaster 50 Series HD Chambered Muffler (REAR): Fits Dodge Ram / Jeep Grand Cherokee (94-14)

Flowmaster

Regular price $312.95 $277.95 11% off

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Flowmaster 40 Series Delta Flow Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (943041)
Flowmaster 40 Series Delta Flow Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (943041)
usa

Flowmaster 40 Series Delta Flow Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (943041)

Flowmaster

Regular price $168.95 $149.95 11% off

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Flowmaster 70 Series Chambered Muffler: Dodge Dakota / Durango / Ram (92-05)
Flowmaster 70 Series Chambered Muffler: Dodge Dakota / Durango / Ram (92-05)
usa

Flowmaster 70 Series Chambered Muffler: Dodge Dakota / Durango / Ram (92-05)

Flowmaster

Regular price $281.95 $249.95 11% off

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Flowmaster 40 Series Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (8043041)
Flowmaster 40 Series Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (8043041)
usa

Flowmaster 40 Series Chambered Muffler: Dodge Ram 2500 / Ram 3500 94-96 (8043041)

Flowmaster

Regular price $152.95 $135.95 11% off

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Flowmaster Flow FX Muffler: Dodge Ram 2500 / Ram 3500 94-96
Flowmaster Flow FX Muffler: Dodge Ram 2500 / Ram 3500 94-96
usa
Flowmaster Super 40 Series Chambered Muffler: Fits Dodge / Ram (92-05)
Flowmaster Super 40 Series Chambered Muffler: Fits Dodge / Ram (92-05)
usa

Flowmaster Super 40 Series Chambered Muffler: Fits Dodge / Ram (92-05)

Flowmaster

Regular price $168.95 $149.95 11% off

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5.9L Magnum & 6.7L Cummins Diesel Engine Upgrades for Torque and Reliability

The 5.9L Magnum V8 and 6.7L Cummins inline-6 are iconic diesel engines celebrated for their torque, towing strength, and durability. Whether you own a classic Ram with the 5.9L or a modern heavy-duty Ram powered by the 6.7L Cummins, upgrading these engines with diesel-specific performance parts can significantly enhance power delivery and dependability.

How Diesel Engine Upgrades Improve Your 5.9L and 6.7L Performance

Diesel engines like the 5.9L Magnum and 6.7L Cummins thrive on torque and efficiency. Upgrades focused on intake airflow, exhaust flow, and fuel delivery optimize combustion and turbocharger response. These improvements translate to stronger towing capability, better throttle response, and sustained power under load.

  • High-flow intake and exhaust systems reduce restrictions and improve turbo efficiency
  • Turbocharger and intercooler upgrades enhance boost control and charge air cooling
  • Fuel system enhancements ensure consistent fuel delivery for higher power demands
  • Performance tuning calibrates engine parameters for optimized power and reliability

Choosing the Right Upgrades for Your Diesel Engine Goals

When selecting upgrades for your 5.9L or 6.7L diesel, consider your primary use—whether it’s daily driving, heavy towing, or performance builds. Intake and exhaust modifications improve airflow, while turbocharger enhancements increase boost and efficiency. Fuel system upgrades become critical as power levels rise, and tuning ties all components together for smooth operation.

Maximize Your Diesel Engine’s Potential with FastHemis Upgrades

From intake manifolds and turbochargers to fuel system components and tuning tools, FastHemis offers a comprehensive selection of parts tailored to the 5.9L Magnum and 6.7L Cummins platforms. Explore our collection to find reliable, performance-driven upgrades that maintain the rugged durability these engines are known for.

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