Cummins ISL Exhaust Manifold & Related Components Catalog

The Cummins ISL engine is a trusted mid-range diesel platform used in marine, industrial, and power generation applications. A key system that keeps it operating at peak performance is the exhaust manifold assembly, which channels hot gases, supports the turbocharger, and maintains efficient backpressure.

This catalog details the exhaust manifold gaskets, turbo mounting gaskets, EGR components, outlet seals, insulation, flanges, mufflers, and hardware designed specifically for the Cummins ISL.

Diesel Pro Power has earned the trust of 40,000+ satisfied customers worldwide, supplying high-quality Cummins parts with fast delivery and expert technical support.

Importance of the Exhaust System in the Cummins ISL

The ISL exhaust system plays a vital role in maintaining reliable performance and emissions compliance. Properly functioning manifold and related components:

• Keep turbo boost pressure consistent by preventing leaks.

• Reduce engine room heat with insulation and controlled flow.

• Support emission reduction technologies like EGR.

• Extend engine service life by preventing uneven stress on pistons, valves, and the turbocharger.

Cummins ISL Exhaust Manifold Components

Exhaust Manifold Gasket

The exhaust manifold gasket is a critical seal between the cylinder head and manifold. On the ISL, this component ensures that combustion gases are directed into the manifold without leaks that could reduce efficiency.

• Precision fit for Cummins ISL engines

• Heat-resistant, long-lasting material

• Prevents soot blow-by and erosion

Turbo Mounting Gasket (For Water-Cooled Turbo Only)

On ISL engines equipped with water-cooled turbochargers, the turbo mounting gasket ensures a tight seal between the turbo and manifold. Without this gasket, exhaust leaks could reduce turbo performance.

• Built for Cummins ISL turbo applications

• High-pressure seal designed for thermal cycling

• Helps maintain turbocharger efficiency

Exhaust Manifold Outlet Connection Gasket

The manifold outlet gasket seals the junction between the exhaust manifold and the turbocharger connection, ensuring uninterrupted flow and pressure.

• Designed for ISL exhaust outlet geometry

• Protects against heat-related failure

• Maintains proper exhaust flow

EGR Valve Gasket

The Cummins ISL uses Exhaust Gas Recirculation (EGR) to lower emissions. The EGR valve gasket ensures exhaust gases are routed back into the intake system without leakage.

• Maintains EPA-compliant emission levels

• Reliable sealing under high heat

• Precision engineered for ISL engines

Intake Manifold Cover Gasket (With Air Heaters)

ISL engines equipped with intake air heaters rely on the intake manifold cover gasket for proper sealing. Any leaks could disrupt airflow, leading to reduced efficiency during cold starts.

• Designed for ISL intake systems with heaters

• Provides consistent combustion airflow

• Ensures reliable cold-weather operation

Exhaust Manifold Hardware

Exhaust Manifold Bolts

Heavy-duty Cummins ISL manifold bolts secure the exhaust manifold against extreme thermal stress. These bolts also serve for alternator brackets and refrigerant compressor mounting in some setups.

• High-strength material prevents loosening

• Marine-grade corrosion resistance

• Designed specifically for ISL applications

Heat Management & Insulation

Exhaust Manifold Insulation Tape

The ISL generates high exhaust temperatures that can affect nearby wiring, hoses, and other components. Manifold insulation tape protects the engine bay by reducing heat transfer.

• Available in 3-inch and 4-inch widths

• Withstands extreme temperatures

• Improves safety and reduces radiant heat in marine installations

Flanges, Gaskets & Mufflers

Exhaust Manifold Flange (4” ID)

For industrial and marine setups, a 4-inch manifold flange provides a secure connection between the manifold and exhaust piping.

• Heavy-duty construction

• Designed to handle marine vibration and exhaust flow

Flange Gasket (4” ID)

The matching flange gasket ensures proper sealing and reduces the risk of leaks at the flange connection.

• Durable gasket material for high-heat conditions

• Sized for 4” inside diameter flanges

Mufflers for Cummins ISL Applications

To control exhaust noise, Diesel Pro Power offers industrial-grade mufflers compatible with ISL systems. These mufflers reduce noise without adding excessive backpressure.

• 4” National Pipe Thread inlet and outlet

• Rugged construction for marine and stationary power applications

• Improves onboard comfort by reducing noise

Muffler End Caps

For custom ISL exhaust setups, muffler caps are available in multiple sizes (3”, 3.5”, 4.5”, and 5”). These allow flexibility in sealing or redirecting exhaust outlets.

• Corrosion-resistant metal caps

• Ideal for industrial and marine installations

Monitoring the Exhaust System

Mechanical & Electrical Gauges

Keeping track of exhaust-related temperatures and pressures helps prevent damage. Diesel Pro Power supplies mechanical and electrical gauges suitable for ISL applications.

• Mechanical gauges with optional alarms

• 12V and 24V electrical gauges

• Helps protect the engine from overheating or excess backpressure

Why Diesel Pro Power is the Best Source for Cummins ISL Exhaust Parts

• Full coverage – From manifold gaskets to mufflers, everything you need for ISL exhaust systems.

• Fast shipping – Large inventory in stock and ready to ship globally.

• Proven trust – Serving 40,000+ customers worldwide.

• Expert knowledge – Specialists in Cummins marine and industrial applications.