Cummins QSK 19 Engine Parts - Exhaust Section

Cummins QSK19 Exhaust System Parts Catalog

The exhaust system is one of the most critical systems in the Cummins QSK19 engine, particularly in high-performance marine, mining, and industrial applications. Designed to manage extreme temperatures, corrosive gases, and high backpressure, the QSK19’s exhaust components require durable materials and precision-engineered gaskets, flanges, and insulation to ensure optimal engine breathing and safe operation.

At Diesel Pro Power, we provide a curated selection of exhaust components for the QSK19, including turbo mounting gaskets, manifold insulation wraps, industrial mufflers, exhaust flanges, and protective end caps. With over 40,000 satisfied customers worldwide, we’re trusted to deliver quality diesel parts fast, reliably, and affordably.

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QSK19 Turbo Mounting Gasket

High-Temp Turbo Mount Gasket for QSK19

This turbo mounting gasket is engineered for the extreme thermal and pressure demands of the QSK19 engine's turbo system. Positioned between the exhaust manifold and the turbocharger flange, this gasket ensures leak-free operation under full boost and high-load thermal cycles.

Key Features:

• Metal-reinforced composite design
  
  

• Ideal for single or dual turbo configurations
  
  

• Heat-resistant and vibration-stable
  
  

• Helps reduce soot buildup and prevent exhaust leaks
  
  

This gasket should be replaced during any turbo service or manifold removal procedure to maintain sealing integrity.

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Exhaust Manifold Insulation Tape

3-Inch Wide Exhaust Insulation Tape (100 ft x 1/8")

This high-temperature fiberglass-based insulation tape wraps around exhaust manifolds, turbo piping, or downpipes to help retain heat within the exhaust stream. Retaining heat improves exhaust gas velocity, reduces under-hood temperatures, and protects nearby components from radiant heat.

Applications:

• QSK19 turbo manifold insulation in marine engine rooms
  
  

• Industrial engine enclosures with limited ventilation
  
  

• Custom exhaust runs in power generation housings
  
  

Benefits:

• Increases turbocharger response by keeping exhaust gases hotter
  
  

• Protects surrounding wiring, hoses, and engine panels
  
  

• Durable enough for continuous-duty marine and mining use
  
  

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4-Inch Wide Exhaust Insulation Tape (100 ft x 1/8")

For applications requiring broader coverage, the 4-inch version provides the same benefits as the 3-inch version but covers larger pipe diameters with fewer layers and less overlap. Suitable for QSK19 engines with large-bore exhaust plumbing or extensive heat shielding needs.

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Industrial Exhaust Flanges and Gaskets

4-Inch Industrial Exhaust Flange

This heavy-duty exhaust flange is designed for industrial manifold and turbo outlet connections. The flange fits standard 4" inside diameter piping and is ideal for connecting the QSK19 engine’s turbocharger to custom exhaust runs or silencer inlets.

Common Use Cases:

• Generator enclosures
  
  

• Offshore or dock-side marine exhaust systems
  
  

• Retrofit exhaust installations on stationary QSK19 engines
  
  

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4-Inch Exhaust Flange Gasket

Precision-cut to match the 4-inch exhaust flange, this gasket provides a tight, heat-resistant seal between the flange and manifold or turbo outlet. Built to endure thousands of thermal cycles without cracking, it prevents leaks that could compromise performance or cause safety issues.

Material Attributes:

• High-temperature fiber composite
  
  

• Anti-stick coating for easy removal
  
  

• Excellent crush resistance for metal-to-metal sealing
  
  

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Industrial Mufflers for QSK19 Engines

4-Inch Diameter Industrial Muffler

This rugged industrial-grade muffler is designed for diesel engines like the Cummins QSK19. With 4-inch National Pipe Thread (NPT) inlet and outlet fittings, it integrates easily into stationary engine exhaust systems, including generator sets and auxiliary power units.

Muffler Features:

• Durable steel construction
  
  

• Internal baffles for optimized sound attenuation
  
  

• Corrosion-resistant coating for long-term outdoor use
  
  

• Designed for marine and mining compliance where noise control is essential
  
  

Applications:

• Remote power stations
  
  

• Vessel generator exhaust systems
  
  

• Mining compressors or engine-driven pumps
  
  

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Muffler End Caps for QSK19 Exhaust Systems

Exhaust caps serve as protective closures for muffler outlets when engines are not running. These caps shield the system from rain, dust, insects, and backflow that can compromise the integrity of the engine’s exhaust tract.

3-Inch Exhaust Cap

• Fits 2.99" outside diameter pipes
  
  

• Suitable for smaller auxiliary exhaust outlets
  
  

3.5-Inch Exhaust Cap

• Designed for 3.5" OD exhaust ports
  
  

• Common in mid-range generator or engine variants
  
  

4.5-Inch Exhaust Cap

• Used on standard QSK19 marine and industrial exhaust stacks
  
  

• Keeps soot, moisture, and debris from entering the exhaust system
  
  

5-Inch Exhaust Cap

• Protects larger exhaust pipes found on high-output generator sets or marine propulsion systems
  
  

• Ideal for harsh outdoor and marine environments
  
  

Cap Materials:

• Stainless or galvanized steel construction
  
  

• Spring-loaded or gravity-fall options
  
  

• Weatherproof and rust-resistant
  
  

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Why Exhaust System Integrity Matters on QSK19 Engines

The exhaust system on a Cummins QSK19 does more than vent spent gases—it directly impacts turbocharger efficiency, backpressure, emissions compliance, and even engine cooling. Leaks, cracks, or failed gaskets can:

• Lower boost pressure and horsepower
  
  

• Increase EGT (Exhaust Gas Temperature)
  
  

• Cause engine alarms and shutdowns
  
  

• Lead to cabin or engine room exhaust intrusion (marine)
  
  

• Compromise EPA or IMO emissions certification
  
  

Proper maintenance of the turbo gasket, flange joints, manifold wraps, and muffler connections ensures safe, efficient, and quiet operation of your engine.

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When to Replace Exhaust Components

• During turbocharger servicing – Always replace the turbo mounting gasket to prevent exhaust leaks.
  
  

• If backpressure exceeds specs – Install or inspect the muffler for blockages.
  
  

• If insulation is degraded – Replace manifold wraps to prevent heat damage to nearby systems.
  
  

• After prolonged engine shutdown – Inspect and replace rusted or missing exhaust caps.