Cummins QSX Parts - Exhaust Section

Cummins QSX Engine Exhaust System Components

The exhaust system is a critical part of any heavy-duty diesel engine, and the Cummins QSX platform is no exception. Designed to handle the high temperatures, backpressure, and vibrations that are inherent in industrial and off-highway applications, QSX exhaust components must be durable, efficient, and built to last. Diesel Pro Power offers an extensive selection of exhaust parts specifically engineered for Cummins QSX and ISX engines—trusted by over 40,000 satisfied customers worldwide.

Whether you're performing scheduled maintenance or a full engine rebuild, having access to premium exhaust gaskets, clamps, manifold insulation, and mufflers ensures reliability, optimal performance, and safety.

Valve Cover Gaskets for Cummins QSX and ISX Engines

High-Performance Valve Cover Sealing

Valve cover gaskets are often overlooked but play an essential role in maintaining proper oil containment and preventing leaks. Our gasket options for Cummins ISX and QSX engines are built from high-grade materials that resist oil saturation and thermal cycling.

Old Style Compatibility

These valve cover gaskets are compatible with older-style Cummins ISX and QSX engine heads, making them a smart replacement for legacy engine platforms still in active use. The gaskets feature precision-molded edges to prevent seepage and simplify installation.

Exhaust Clamps for Cummins QSX and ISX Engines

Designed for High-Vibration Environments

Diesel engines like the Cummins QSX generate significant vibration and thermal expansion at the exhaust connection points. Our stainless steel and coated steel exhaust clamps are purpose-built to maintain tight seals in high-heat environments.

Available Clamp Styles

We carry multiple clamp models for ISX and QSX engines to accommodate different diameters and connection points. These clamps are designed for quick installation and long-lasting grip, ensuring minimal downtime and fewer re-tightening requirements.

Manifold Insulation Tape – Heat Shielding for Industrial Use

Thermal Protection Where It Counts

Proper exhaust insulation is critical for preventing heat soak into nearby engine components. We offer manifold insulation tape in two widths—3 inches and 4 inches—both with a durable 1/8-inch thickness for maximum thermal resistance.

3" and 4" Width Options

• 3" Wide Insulation Tape: Ideal for tighter bend radii or wrapping smaller diameter exhaust manifolds and elbows.
  
  

• 4" Wide Insulation Tape: Suitable for larger manifolds or broader coverage, especially in heavy industrial setups.
  
  

These tapes improve under-hood temperatures, reduce radiant heat, and help protect electrical and fuel system components from thermal degradation.

Flanges and Gaskets for Industrial Exhaust Manifolds

Secure Sealing for 4-Inch Exhaust Systems

Exhaust flanges are critical for joining pipe sections, especially when servicing industrial or marine engines where vibration and stress are common. We offer durable flanges with a 4" internal diameter, precision-machined for secure fitting.

Gasket Compatibility

Matching flange gaskets ensure a tight, leak-free seal. Our gaskets are manufactured from high-temperature materials that won’t deteriorate under constant thermal cycling, preventing dangerous leaks and maintaining backpressure efficiency.

Industrial Mufflers for 4-Inch Exhaust Outlets

Engineered for Sound Attenuation

Our industrial mufflers for 4" diameter exhaust pipes are engineered for diesel engines requiring effective noise suppression. These mufflers feature robust construction and are compatible with both Cummins and Detroit Diesel engines across a wide range of applications, from marine to stationary industrial use.

Key Muffler Features

• 4" NPT inlet and outlet for simple retrofitting
  
  

• Internal baffling to reduce engine exhaust noise without restricting flow
  
  

• Corrosion-resistant materials for long-term durability
  
  

Muffler Caps for Industrial Engines

Protecting Your Exhaust System

Exhaust caps serve as protective covers that prevent moisture, debris, and pests from entering your muffler system during downtime or storage. We offer a wide variety of cap sizes to match most industrial diesel engine mufflers:

• 3" Muffler Cap: Pipe OD 2.99" (7.59 cm)
  
  

• 3.5" Muffler Cap: Pipe OD 3.50" (8.89 cm)
  
  

• 4.5" Muffler Cap: Pipe OD 4.49" (11.40 cm)
  
  

• 5" Muffler Cap: Pipe OD 5.00" (12.7 cm)
  
  

These caps are essential for fleet operators, marine engine users, or anyone storing engines in high-moisture environments. Using caps can extend the life of your muffler and downstream exhaust components by reducing corrosion and fouling.

Mechanical and Electrical Gauges for Exhaust Monitoring

Monitoring Heat and Pressure in Real Time

Although not technically part of the exhaust system, mechanical and electric gauges play a vital role in monitoring exhaust gas temperatures, pressure drops across mufflers, and other critical parameters. We offer:

• Mechanical Gauges (Standard and with Alarm)
  
  

• Electrical Gauges for 12V and 24V Systems
  
  

Integrating these gauges into your Cummins QSX engine platform allows for real-time diagnostics, helping to detect manifold leaks, turbo issues, or muffler blockages before they lead to engine failure.

Why Diesel Pro Power for QSX Exhaust Components?

Expertise You Can Trust

With over 40,000 satisfied customers and decades of experience in industrial diesel engine parts, Diesel Pro Power is your premier source for Cummins QSX exhaust components. Every product in our catalog has been carefully selected for compatibility, durability, and performance.

We understand the demands of marine, mining, construction, and stationary power applications—and we know how important uptime is to your bottom line.

Benefits of Shopping with Diesel Pro Power

• Same-day shipping on in-stock items
  
  

• Worldwide delivery with reliable tracking
  
  

• Multilingual support in English and Spanish
  
  

• Expert advice to ensure the right fit for your engine model
  
  

• Inventory curated for Cummins ISX, QSX, and QSK platforms
  
  

Additional Exhaust System Tips for Cummins QSX Engines

Maintain Regular Inspection Intervals

Inspect exhaust clamps, gaskets, and manifold surfaces every 250 to 500 engine hours, especially if operating in high-vibration or marine environments. Look for signs of soot leakage or corrosion at flanges and clamp joints.

Upgrade Insulation in High-Heat Zones

In applications with tight engine compartments or where components sit close to the exhaust manifold, upgrade to wider insulation tape and consider additional heat shielding panels. This small investment can protect sensors, wires, and fuel lines from heat damage.

Use Muffler Caps During Storage

Always cap your exhaust ports when storing your engine, especially in outdoor or high-humidity conditions. This simple step can extend the service life of your muffler, turbocharger, and downstream piping.

Common Applications for Cummins QSX Exhaust Components

These exhaust system parts are suitable for a range of applications powered by Cummins QSX engines:

• Marine propulsion and auxiliary engines
  
  

• Generator sets (gensets)
  
  

• Industrial compressors
  
  

• Hydraulic power units
  
  

• Oilfield and mining equipment
  
  

• Heavy-duty construction machinery