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home > 4040366 | Genuine Cummins® Turbo Exhaust Elbow For 6.7L Ram > 4040366 | Genuine Cummins® Turbo Exhaust Elbow For 6.7L Ram
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4040366 | Genuine Cummins® Turbo Exhaust Elbow For 6.7L RamDescription: Turbo Exhaust Elbow For 20072018 Ram 2500 3500 (6. 7L diesel) Condition: New Brand: Cummins Part Number: 4040366 Fitment Guide 4040366: For 20072018 Ram 2500 3500 (6. 7L diesel) A turbo exhaust elbow 4040366 is a curved metal pipe that connects the turbocharger to the rest of the exhaust system, directing exhaust gases away from the turbo. 1. Smooth exhaust flow out of the turboAfter exhaust gases spin the turbocharger, the elbow provides
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Description: Turbo Exhaust Elbow For 2007–2018 Ram 2500 / 3500 (6.7L diesel)
Condition: New
Brand: Cummins®
Part Number: 4040366

Fitment Guide 4040366:
For 2007–2018 Ram 2500 / 3500 (6.7L diesel)

A turbo exhaust elbow 4040366 is a curved metal pipe that connects the turbocharger to the rest of the exhaust system, directing exhaust gases away from the turbo.

 

1. Smooth exhaust flow out of the turbo
After exhaust gases spin the turbocharger, the elbow provides a curved, controlled path for those gases to exit without turbulence.

2. Reduce backpressure
A well-designed elbow helps reduce resistance in the exhaust system, which:

  • Improves engine efficiency
  • Helps the turbo spool faster
  • Can increase power output

3. Connect the turbo to the exhaust system
It acts as the link between the turbocharger and the downpipe, forming the first section of the exhaust after the turbo.

4. Improve performance and responsiveness
Better exhaust flow = quicker turbo response and smoother engine operation.

5. Safely route hot gases away
It directs extremely hot exhaust gases away from sensitive engine components and toward the exhaust system.


Signs of Faulty 4040366 :

 

1. Exhaust leaks

  • Hissing, ticking, or “whooshing” noise (especially under acceleration)
  • Soot or black residue around the elbow connection
  • Strong exhaust smell in the engine bay

2. Loss of power

  • Slower turbo spool
  • Reduced acceleration
  • Caused by escaping exhaust gases or increased backpressure

3. Decreased fuel efficiency

  • Engine has to work harder due to poor exhaust flow
  • You may notice more frequent fuel fill-ups

4. Check engine light

  • Fault codes related to exhaust flow, boost pressure, or oxygen sensors

5. Excessive heat in engine bay

  • Leaks can direct hot gases onto nearby components
  • May damage hoses, wiring, or nearby parts over time

6. Visible damage

  • Cracks in the elbow (common with heat stress)
  • Rust or corrosion
  • Warped flange causing poor sealing

7. Turbo performance issues

  • Inconsistent boost
  • Whining or unusual turbo noises (from inefficient exhaust flow)



Manufacturer information

Cummins® is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.

Warranty
First Truck Parts offers a 365-days warranty for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website. 

4040366 | Genuine Cummins® Turbo Exhaust Elbow For 6.7L Ram

Item no : 66773855721
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