5418486 | Genuine Cummins® Outlet Catalyst Module EPA17 6.7L ISB/QSB

•  Freightliner M2 106 — 2022–2024, B6.7 EPA21
• FCCC (Freightliner Custom Chassis) — 2022–2024 B6.7, approximately 280–325 HP, EPA21.
• Navistar/International — 2022–2024 B6.7/L9

• Reduce Harmful Pollutants

Converts carbon monoxide (CO), unburned hydrocarbons (HC), and sometimes nitrogen oxides (NOx) into less harmful substances like carbon dioxide, nitrogen, and water vapor.

• Assist Diesel Particulate Filter (DPF) Regeneration

In some designs, it helps raise exhaust temperature to burn off trapped soot in the DPF, keeping the filter clean and efficient.

• Meet Emissions Regulations

Helps vehicles comply with strict emission standards like EPA, Euro 5, Euro 6, or similar local regulations.

• Protect the Environment and Health

By reducing pollutants, it limits air pollution, smog, and health risks associated with diesel exhaust.

• Improve Engine Efficiency and Longevity

Proper emission control prevents soot buildup downstream, reducing stress on other components like the turbocharger or muffler

• Check Engine or DPF Warning Light

Dashboard lights may illuminate, indicating an aftertreatment problem or inefficient catalyst performance.

• Reduced Engine Performance

The engine may lose power or accelerate sluggishly because a blocked or damaged catalyst restricts exhaust flow.

• Increased Fuel Consumption

The engine may work harder to maintain performance, consuming more fuel than usual.

• Excessive Smoke or Unusual Exhaust Color

Black or dark smoke may appear if the catalyst isn’t properly converting hydrocarbons or assisting DPF regeneration.

• Frequent Regeneration Cycles

If the Outlet Catalyst Module isn’t functioning, the system may attempt DPF regeneration more often, sometimes unsuccessfully.

• Strange Smells

A burning or chemical odor from the exhaust may indicate the catalyst is overheating or failing.

• Limp Mode Activation

Many modern diesel vehicles will reduce engine power to protect the engine if the module is severely blocked or malfunctioning.

• Failed Emissions Test

A malfunctioning outlet catalyst will often cause the vehicle to fail emissions inspections due to higher pollutants in the exhaust.