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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.
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487 Results

Vibrant O2 Sensor Restrictor Fitting (STRAIGHT) w/ Adjustable Jets (CEL Eliminator)
Vibrant O2 Sensor Restrictor Fitting (STRAIGHT) w/ Adjustable Jets (CEL Eliminator)

Vibrant O2 Sensor Restrictor Fitting (STRAIGHT) w/ Adjustable Jets (CEL Eliminator)

Vibrant
5.0 (1)

Regular price from $22.99 25% off

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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

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per 

PPE Battery Heat Shield: Ram 1500 / 2500 / 3500 (16-25)
PPE Battery Heat Shield: Ram 1500 / 2500 / 3500 (16-25)
usa
DeatschWerks 42lb Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
DeatschWerks 42lb Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)

DeatschWerks 42lb Fuel Injectors: Fits Most Dodge/Ram (03-24)

Deatschwerks

$439.00

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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

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per 

2 filter types
Deatschwerks 60lb/hr Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
Deatschwerks 60lb/hr Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
Pedal Commander Bluetooth Throttle Response Controller: 300 / Challenger / Charger / Magnum 2007 - 2024 (All Models)
Pedal Commander Bluetooth Throttle Response Controller: 300 / Challenger / Charger / Magnum 2007 - 2024 (All Models)
American Brother Designs Coolant Reservoir Cap Cover: Dodge Durango, Jeep Grand Cherokee, Jeep Wagoneer, Ram
American Brother Designs Coolant Reservoir Cap Cover: Dodge Durango, Jeep Grand Cherokee, Jeep Wagoneer, Ram
usa

American Brother Designs Coolant Reservoir Cap Cover: Fits Jeep / Dodge / Ram (09-26)

American Brother Designs

Regular price $109.00 $59.00 46% off

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Flowtech Shorty Headers (Black Painted): Dodge Ram / Dakota / Durango 5.2L & 5.9L V8 1996 - 2003
Flowtech Shorty Headers (Black Painted): Dodge Ram / Dakota / Durango 5.2L & 5.9L V8 1996 - 2003

Flowtech Shorty Headers (Black Painted): Dodge Ram / Dakota / Durango 5.2L & 5.9L V8 1996 - 2003

Flowtech

Regular price $518.95 $478.95 8% off

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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

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per 

2 filter types
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 $312.95 41% off

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American Brother Designs Washer Fluid Cap Cover: Jeep Wrangler (18-25) & Gladiator (20-25)
American Brother Designs Washer Fluid Cap Cover: Jeep Wrangler (18-25) & Gladiator (20-25)
usa

American Brother Designs Washer Fluid Cap Cover: Jeep Wrangler (18-25) & Gladiator (20-25)

American Brother Designs

Regular price $109.00 $59.00 46% off

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JBA Shorty Headers (Raw Finish): Dodge Ram 5.7L Hemi 2003 - 2008 (1500, 2500 & 3500)
JBA Shorty Headers (Raw Finish): Dodge Ram 5.7L Hemi 2003 - 2008 (1500, 2500 & 3500)
Superchips Wireless Amp'd 2.0 Pedal Controller: Fits Most Dodge / Ram / Chrysler Models (2005-2026)

Superchips Wireless Amp'd 2.0 Pedal Controller: Fits Most Dodge / Ram / Chrysler Models (2005-2026)

Superchips
5.0 (1)

Regular price $322.95 $299.95 7% off

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Bully Dog GT Platinum Tuner: Fits Dodge/Jeep/Ram 2003-2014 5.7/6.1L HEMI
Bully Dog GT Platinum Tuner: Fits Dodge/Jeep/Ram 2003-2014 5.7/6.1L HEMI
K&N 57 Series Cold Air Intake: RAM 2500 & 3500 6.7L Diesel 2013-2018
K&N 57 Series Cold Air Intake: RAM 2500 & 3500 6.7L Diesel 2013-2018

K&N 57 Series Cold Air Intake: Ram 2500 / 3500 13-18 6.7L Diesel

K&N Engineering

$212.99

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King Chrysler Dodge Hemi 5.7L/6.1L V8 Performance Rod Bearing Set - Size STDX
Flowmaster FloxFX Exhaust System (Single Side Exit): Dodge Ram 3.9L, 5.2L & 5.9L 1994 - 2001 (1500 / 2500 / 3500)
Flowmaster FloxFX Exhaust System (Single Side Exit): Dodge Ram 3.9L, 5.2L & 5.9L 1994 - 2001 (1500 / 2500 / 3500)
usa
Deatschwerks 72lb/hr Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
Deatschwerks 72lb/hr Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
Deatschwerks 95lb/hr Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
Deatschwerks 95lb/hr Fuel Injectors: Chrysler / Dodge / Jeep / Ram 2003 - 2025 (5.7L Hemi, 6.1L SRT8, 6.4L 392)
Cometic MLX RHS Head Gasket (4.150" Bore, .062" Thick): Fits Chrysler / Dodge / Jeep / Ram (11-26)
Cometic MLX RHS Head Gasket (4.150" Bore, .062" Thick): Fits Chrysler / Dodge / Jeep / Ram (11-26)
usa

Cometic MLX RHS Head Gasket (4.150" Bore, .062" Thick): Fits Chrysler / Dodge / Jeep / Ram (11-26)

Cometic Gasket

Regular price $137.84 $124.07 10% off

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Superchips F5 Flashpaq Tuner: Fits Most Hemi Models

Superchips F5 Flashpaq Tuner: Fits Dodge / Ram / Chrysler (98-14)

Superchips

Regular price $518.95 $499.95 4% off

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Smarty SJ-67 Junior 67 Tuner: Fits Most Dodge Ram Models
Smarty SJ-67 Junior 67 Tuner: Fits Most Dodge Ram Models
AMP Research Wire Harness: Fits Most Ram (13-22)
AMP Research Wire Harness: Ram 1500 (13-18) / 2500 (13-22) / 3500 (13-22)

AMP Research Wire Harness: Fits Most Ram (13-22)

AMP Research

$149.99

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S&B Cold Air Intake: Dodge Ram 5.9L Cummins Diesel 2003 - 2007 (2500 / 3500)
S&B Cold Air Intake: Dodge Ram 5.9L Cummins Diesel 2003 - 2007 (2500 / 3500)
usa

S&B Cold Air Intake: Dodge Ram 5.9L Cummins Diesel 2003 - 2007 (2500 / 3500)

S&B Filters

Regular price $429.99 $379.00 12% off

Unit price
per 

2 filter types
S&B Cold Air Intake: Dodge Ram 6.7L Cummins Diesel 2010 - 2012 (2500 / 3500)
S&B Cold Air Intake: Dodge Ram 6.7L Cummins Diesel 2010 - 2012 (2500 / 3500)
usa

S&B Cold Air Intake: Dodge Ram 6.7L Cummins Diesel 2010 - 2012 (2500 / 3500)

S&B Filters

Regular price $429.99 $379.00 12% off

Unit price
per 

2 filter types
Banks Monster-Ram Intake System Black (F&R): RAM 2500/3500 2013-2018 6.7L Cummins
Banks Monster-Ram Intake System Black (F&R): RAM 2500/3500 2013-2018 6.7L Cummins
usa

Banks Monster-Ram Intake System Black (F&R): Ram 2500 / 3500 13-18 6.7L Diesel

Banks Power

Regular price $831.11 $748.00 10% 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.

SELECT YOUR VEHICLE