Free shipping on orders over $250

Your cart

Your cart is empty

5.9L / 6.7L Diesel Engine Upgrades

5.9L and 6.7L Diesel Engine Upgrades for Power and Durability The 5.9L Magnum V8 and 6.7L Cummins inline-6 are legendary diesel platforms known for their torque, towing capability, and long-lasting reliability. Whether you drive a classic Ram with the 5.9L or a modern heavy-duty Ram equipped with the 6.7L Cummins, these engines respond well to targeted upgrades that enhance performance and dependability. In this collection, you’ll find parts tailored to diesel-specific needs including intake and exhaust improvements, turbocharger enhancements, fuel system upgrades, and tuning solutions. These components help maximize torque output, improve throttle response, and boost towing power while maintaining the rugged reliability these engines are known for. Popular upgrade categories include: - Turbocharger and intercooler upgrades - High-flow intake and exhaust systems - Diesel fuel system enhancements - Performance tuning and calibration tools - Durability and reliability parts Shop 5.9L and 6.7L diesel engine upgrades at FastHemis.
SELECT YOUR VEHICLE

636 Results

DiabloSport inTune i3 Platinum Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014
DiabloSport inTune i3 Platinum Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014

DiabloSport inTune i3 Platinum Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014

Diablo Sport
4.8 (8)

Regular price $535.95 $482.36 10% off

Unit price
per 

American Brother Designs Oil Cap Cover: Chrysler / Dodge / Jeep / Ram Hemi 2005 - 2024
American Brother Designs Oil Cap Cover: Chrysler / Dodge / Jeep / Ram Hemi 2005 - 2024
usa

American Brother Designs Oil Cap Cover: Chrysler / Dodge / Jeep / Ram Hemi 2005 - 2024

American Brother Designs
4.5 (2)

Regular price $101.49 $69.00 32% off

Unit price
per 

DiabloSport Trinity 2 (T2 EX) Platinum Programmer / Monitor: Chrysler / Dodge / Ram 2005 - 2014
DiabloSport Trinity 2 (T2 EX) Platinum Programmer / Monitor: Chrysler / Dodge / Ram 2005 - 2014

DiabloSport Trinity 2 (T2 EX) Platinum Programmer / Monitor: Chrysler / Dodge 2005 - 2014

Diablo Sport
5.0 (3)

Regular price $818.95 $737.06 10% off

Unit price
per 

AFE Throttle Body Spacer: Chrysler 300C / Dodge Challenger / Charger & Magnum 2005 - 2024 (5.7L Hemi, 6.1L SRT8 & 6.4L 392)
AFE Throttle Body Spacer: Chrysler 300C / Dodge Challenger / Charger & Magnum 2005 - 2024 (5.7L Hemi, 6.1L SRT8 & 6.4L 392)
usa

aFe Throttle Body Spacer: Fits Dodge / Chrysler / Jeep / Ram (05-26) 5.7L Hemi / SRT8 / 392

aFe
5.0 (2)

Regular price $139.00 $132.05 5% off

Unit price
per 

American Brother Designs Washer Fluid Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
American Brother Designs Washer Fluid Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
usa

American Brother Designs Washer Fluid Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025

American Brother Designs

Regular price $109.00 $59.00 46% off

Unit price
per 

DiabloSport inTune i3 Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014
DiabloSport inTune i3 Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014

DiabloSport inTune i3 Programmer: 300 / Challenger / Charger / Magnum / Ram / Durango 2005 - 2014

Diablo Sport
5.0 (2)

Regular price $535.95 $482.36 10% off

Unit price
per 

American Brother Designs Engine Bay Tag: Chrysler / Dodge / Jeep / Ram
American Brother Designs Engine Bay Tag: Chrysler / Dodge / Jeep / Ram
usa

American Brother Designs Engine Bay Tag: Chrysler / Dodge / Jeep / Ram

American Brother Designs
5.0 (1)

Regular price $76.00 $56.00 26% off

Unit price
per 

American Brother Designs Radiator Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
American Brother Designs Radiator Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
usa

American Brother Designs Radiator Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025

American Brother Designs
5.0 (1)

Regular price $109.00 $59.00 46% off

Unit price
per 

American Brother Designs Coolant Reservoir Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
American Brother Designs Coolant Reservoir Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025
usa

American Brother Designs Coolant Reservoir Cap Cover: Chrysler, Dodge, Jeep & Ram 2005 - 2025

American Brother Designs

Regular price $109.00 $59.00 46% off

Unit price
per 

S&B Cold Air Intake: Ram 6.7L Cummins Diesel 2019 - 2024 (2500 / 3500)
S&B Cold Air Intake: Ram 6.7L Cummins Diesel 2019 - 2024 (2500 / 3500)
usa

S&B Cold Air Intake: Ram 6.7L Cummins Diesel 2019 - 2024 (2500 / 3500)

S&B Filters

Regular price $429.99 $379.00 12% off

Unit price
per 

PPE Battery Heat Shield: Ram 1500 / 2500 / 3500 (16-25)
PPE Battery Heat Shield: Ram 1500 / 2500 / 3500 (16-25)
usa

PPE Battery Heat Shield: Ram 1500 / 2500 / 3500 (16-25)

PPE

Regular price $29.99 $26.99 10% off

Unit price
per 

Bully Dog Thruster Throttle Booster: Fits Most Chrysler / Dodge / Jeep / Ram Models (2005-2022)
Bully Dog Thruster Throttle Booster: Fits Most Chrysler / Dodge / Jeep / Ram Models (2005-2022)

Bully Dog Thruster Throttle Booster: Fits Most Chrysler / Dodge / Jeep / Ram Models (2005-2022)

Bully Dog

Regular price $299.00 $157.57 47% off

Unit price
per 

S&B Cold Air Intake: Ram 6.7L Cummins Diesel 2013 - 2018 (2500 / 3500)
S&B Cold Air Intake: Ram 6.7L Cummins Diesel 2013 - 2018 (2500 / 3500)
usa

S&B Cold Air Intake: Ram 6.7L Cummins Diesel 2013 - 2018 (2500 / 3500)

S&B Filters

Regular price $429.99 $379.00 12% off

Unit price
per 

DiabloSport Predator 2 Tuner: Dodge Ram / Ram / Durango / Dakota 2005 - 2018 (V6 & V8 Models)
DiabloSport Predator 2 Tuner: Dodge Ram / Ram / Durango / Dakota 2005 - 2018 (V6 & V8 Models)

DiabloSport Predator 2 Tuner: Dodge Ram / Durango / Dakota 2005 - 2018 (V6 & V8 Models)

Diablo Sport
5.0 (2)

Regular price $532.95 $479.66 10% off

Unit price
per 

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.

SELECT YOUR VEHICLE