Cummins ISB 5.9 Parts for Canada - Exhaust Section

Exhaust System Components for Cummins ISB 5.9 Engines

The Cummins ISB 5.9L is widely recognized for its durability and efficiency in both marine and industrial applications, but optimal performance depends heavily on a properly maintained exhaust system. The exhaust assembly not only directs combustion gases away from the engine but also impacts fuel efficiency, noise levels, and engine longevity. At Diesel Pro Power, we offer high-quality exhaust components designed for the ISB 5.9, ensuring a precise fit and long-lasting reliability.

Our inventory covers everything from intake manifold gaskets to full industrial muffler setups, plus protective caps and insulation materials that safeguard your system from heat damage. Whether you are restoring a workboat’s propulsion system or overhauling a stationary power unit, these components are engineered for heavy-duty service.

Intake Manifold Cover Gasket for Cummins ISB 5.9

A critical seal within the engine’s air intake system, the intake manifold cover gasket ensures that no unmetered air enters the combustion chamber. On the ISB 5.9, this gasket helps maintain precise air-to-fuel ratios, supporting optimal combustion and preventing performance loss.

• Function: Creates an airtight seal between the intake manifold cover and the cylinder head

• Applications: Suitable for marine propulsion engines, generator sets, and industrial equipment powered by the ISB 5.9

• Maintenance Tip: Always inspect the gasket when performing intake manifold service to prevent boost leaks in turbocharged models

Manifold Insulation Tape – 3" and 4" Wide Options

Exhaust manifolds on a Cummins ISB 5.9 can reach extremely high temperatures. Without proper insulation, nearby components may be exposed to damaging heat. Manifold insulation tape is an effective solution for retaining heat within the manifold and exhaust piping, improving exhaust gas velocity and protecting surrounding parts.

• 3" Wide x 100 Feet (1/8" Thick): Ideal for compact manifold designs or smaller pipe diameters

• 4" Wide x 100 Feet (1/8" Thick): Provides broader coverage for larger diameter manifolds or high-heat industrial setups

• Benefits:

• Reduces heat transfer to surrounding engine components

• Improves safety for technicians working in tight engine compartments

• Helps maintain exhaust gas energy for more efficient turbocharger operation

Industrial Exhaust Manifold Flange – 4" Inside Diameter

For ISB 5.9 engines used in stationary or marine industrial setups, a 4" inside diameter manifold flange serves as a durable connection point between the manifold outlet and the exhaust piping. Its heavy-duty steel construction withstands continuous vibration and temperature cycling.

• Primary Role: Provides a secure, leak-free interface for high-temperature exhaust flow

• Common Uses: Marine generator exhaust routing, industrial pumping units, and commercial workboat propulsion systems

• Installation Note: Always pair with a correct flange gasket to maintain seal integrity

Gasket for 4" Industrial Exhaust Flange

A robust flange gasket is essential for preventing exhaust leaks at the connection point between the manifold flange and downstream piping. On a Cummins ISB 5.9, exhaust leaks can lead to reduced turbocharger efficiency and higher emissions.

• Material: Heat-resistant composite designed for continuous exposure to high exhaust temperatures

• Fitment: Designed specifically for 4" inside diameter flanges used in industrial and marine ISB 5.9 applications

• Best Practice: Replace whenever the flange connection is serviced to ensure a fresh, reliable seal

Muffler for Industrial Engines – 4" Inlet & Outlet

A 4" NPT industrial-grade muffler is a key component for noise control in Cummins ISB 5.9 applications. This heavy-duty muffler is designed to handle high exhaust volumes while reducing sound levels to comply with workplace or maritime noise regulations.

• Inlet/Outlet Size: 4" National Pipe Thread (NPT)

• Application Range: Workboats, commercial fishing vessels, standby generators, and heavy machinery

• Performance Benefits:

• Significant noise reduction without excessive back pressure

• Corrosion-resistant design for extended life in marine environments

• Sizing Tip: Always confirm muffler dimensions before installation to ensure adequate clearance in your exhaust layout

Muffler Caps – Protecting the Exhaust Outlet

Muffler caps are critical in preventing rain, debris, and pests from entering the exhaust system when the engine is not running. Available in multiple sizes for ISB 5.9 exhaust outlets, these caps ensure the integrity of the exhaust tract and reduce corrosion risk.

• 3" Cap: Fits outlets measuring approximately 2.99" OD

• 3 ½" Cap: Fits outlets measuring approximately 3.50" OD

• 4 ½" Cap: Fits outlets measuring approximately 4.49" OD

• 5" Cap: Fits outlets measuring approximately 5" OD

Why They Matter:

• Protect internal exhaust components from water damage

• Reduce rust formation in mufflers and exhaust piping

• Prevent nesting insects or rodents from entering the exhaust path

Maintaining the Cummins ISB 5.9 Exhaust System

A well-maintained exhaust system ensures optimal turbocharger function, keeps exhaust temperatures within safe limits, and contributes to the engine’s overall fuel economy. For marine applications, corrosion control is especially important—saltwater environments can accelerate exhaust component wear if protective coatings or stainless options are not used.

Key Maintenance Practices:

1. Regular Inspections: Check for cracks, soot deposits at joints, and rust formation

2. Gasket Replacement: Install new gaskets any time a joint is opened

3. Insulation Renewal: Replace worn or frayed manifold insulation tape to maintain heat control

4. Outlet Protection: Use muffler caps when engines are stored outdoors or in high-moisture environments