Cummins NT855 Engine Parts – Exhaust System Components

The Cummins NT855 engine, part of the legendary Cummins 855 series, is built for durability, long service life, and reliable performance in marine and industrial applications. A crucial part of that performance is the exhaust system, which is responsible for safely removing hot gases from combustion, managing engine temperatures, and ensuring efficiency under heavy-duty operating conditions.

This section covers exhaust manifolds, gaskets, insulation components, flanges, mufflers, and related accessoriesspecifically for the Cummins NT855 engine. Every component offered through Diesel Pro Power is engineered to OEM-equivalent standards, with water-cooled options available for marine applications where heat management is essential. With over 40,000 satisfied customers worldwide, Diesel Pro Power has become the go-to source for Cummins exhaust parts that deliver both performance and reliability.

Exhaust Manifolds for Cummins NT855

Water-Cooled Exhaust Manifold

The NT855 engine requires a heavy-duty exhaust manifold capable of withstanding extreme operating conditions. Diesel Pro Power supplies a water-cooled exhaust manifold designed specifically for Cummins NT855 and NH855 engines. The water-cooled design is critical for marine applications, where keeping exhaust gas temperatures manageable prevents damage to surrounding components and reduces the risk of overheating.

Key Features:

• Fits Cummins NT855 and NH855 engine configurations

• Water-cooled design for marine and continuous-duty applications

• Cast from high-strength, heat-resistant materials for long service life

• Precision-machined mounting surfaces to ensure leak-free fit

A properly functioning manifold not only helps the engine breathe efficiently but also reduces back pressure, which improves overall performance and fuel economy.

Exhaust Manifold Gaskets

NT855 Manifold Gasket Set

Every time the manifold is installed or serviced, the gasket must be replaced to maintain a proper seal. Diesel Pro Power supplies manifold gaskets for Cummins NT855, NH855, and even compatible N14 engines. These gaskets are designed to withstand extreme heat and constant pressure cycles.

Details:

• Six gaskets are required per NT855 engine

• Manufactured from durable, heat-resistant composite materials

• Prevents exhaust leaks that could lead to efficiency loss or engine compartment heat buildup

• Ensures proper sealing between the manifold and cylinder head

Replacing gaskets during any manifold service is highly recommended to ensure long-term reliability.

Exhaust Insulation and Heat Protection

High exhaust temperatures can damage nearby wiring, hoses, and sensitive components. To combat this, Diesel Pro Power offers manifold insulation tape in multiple sizes.

Manifold Insulation Tape – 3" Wide

• 3 inches wide by 100 feet long

• 1/8" thick

• Ideal for wrapping manifold sections or exhaust pipes in confined spaces

Manifold Insulation Tape – 4" Wide

• 4 inches wide by 100 feet long

• 1/8" thick

• Provides broader coverage for larger diameter exhaust sections

These insulation tapes help retain heat within the exhaust system, improving scavenging efficiency while protecting the engine room or compartment from excessive heat exposure.

Exhaust Flanges and Gaskets

4" Industrial Exhaust Flange

For NT855 installations in industrial environments, a durable flange ensures a secure connection between the manifold and exhaust piping. Diesel Pro Power supplies 4-inch inside diameter flanges built for heavy-duty use.

Matching Flange Gaskets are also available to provide a reliable seal, preventing gas leaks at connection points. These gaskets are engineered for high-heat and high-pressure conditions common to Cummins NT855 exhaust systems.

Mufflers and Exhaust System Accessories

Heavy-Duty Industrial Muffler – 4" Diameter

A muffler is essential for reducing engine noise while maintaining exhaust flow efficiency. Diesel Pro Power offers 4-inch industrial mufflers designed for Cummins NT855-powered applications. These mufflers use a National Pipe Thread (NPT) 4-inch inlet and outlet for universal industrial and marine compatibility.

Key Benefits:

• Noise reduction without restricting exhaust flow

• Heavy-duty steel construction for long-lasting performance

• Available with dimensional specifications for accurate fitment

Muffler End Caps

Diesel Pro Power also offers muffler end caps in multiple sizes (3", 3.5", 4.5", and 5" diameters). These caps are designed to protect the exhaust system when engines are inactive or during certain industrial and marine configurations.

Available Sizes:

• 3" muffler cap

• 3.5" muffler cap

• 4.5" muffler cap

• 5" muffler cap

These end caps help prevent debris, water, and contaminants from entering the exhaust system, extending the life of both mufflers and manifolds.

Importance of Using Genuine-Quality Exhaust Components

The Cummins NT855 is a workhorse engine, often running under heavy loads for extended periods. Using high-quality exhaust system parts ensures:

• Improved fuel efficiency by maintaining proper airflow and reducing back pressure

• Lower engine compartment temperatures for better component protection

• Extended engine life due to reduced risk of exhaust leaks and overheating

• Noise reduction for a more controlled operation in industrial and marine settings

Whether operating on a vessel, in a power generation plant, or in heavy machinery, maintaining the NT855 exhaust system with premium parts is crucial for long-term performance.

Why Order from Diesel Pro Power?

• Trusted Worldwide – Over 40,000 satisfied customers across more than 200 countries

• Same-Day Shipping – Most orders ship within 24 hours

• Global Support – Knowledgeable staff with deep expertise in Cummins engines

• One-Stop Shop – From manifolds to mufflers, every NT855 exhaust component is available in one place

Diesel Pro Power simplifies the process of finding and ordering the correct exhaust parts for the Cummins NT855, ensuring you receive the right fit the first time.