Chevrolet Performance Parts Multi-Layer Steel Exhaust Manifold Gasket — 1.870" Round Port GM LS-Series

SKU: FMQX_12617944
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Chevrolet Performance Parts

Chevrolet Performance Parts engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Chevrolet Performance Parts lineup with fast shipping and expert fitment support — order with confidence.

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Seal Your Exhaust System with Chevrolet Performance Multi-Layer Steel Manifold Gasket

Eliminate frustrating exhaust leaks and restore optimal engine performance with the Chevrolet Performance Multi-Layer Steel (MLS) Exhaust Manifold Gasket (MPN 12617944). Designed specifically for GM LS-Series engines featuring 1.870-inch round ports, this gasket is absolutely crucial for maintaining proper exhaust flow, preventing power loss, and ensuring your engine runs efficiently and cleanly. Exhaust leaks can lead to a cascade of issues, including reduced horsepower, increased emissions, an unpleasant exhaust smell within the cabin, and even potential damage to other engine components, making a high-quality, reliable seal absolutely essential.

Advanced MLS Construction for Extreme Durability

This premium gasket features a state-of-the-art Multi-Layer Steel (MLS) construction, renowned throughout the performance industry for its exceptional durability and unparalleled ability to withstand extreme temperatures and pressures. Unlike traditional composite gaskets that can degrade, crack, or blow out over time, the MLS design comprises multiple layers of precisely embossed steel, creating a robust and resilient seal that conforms perfectly to mating surfaces. This advanced engineering ensures a long-lasting, leak-free connection between your exhaust manifold and cylinder head, even under the most demanding driving conditions, including forced induction setups, high-RPM racing applications, and heavy-duty use.

Key Features & Performance Benefits:

  • Multi-Layer Steel (MLS) Design: Provides superior sealing integrity and extreme heat resistance for demanding applications.
  • 1.870-inch Round Port Specific: Ensures a precise, perfect fit for compatible GM LS-Series engines, optimizing flow.
  • Prevents Exhaust Leaks: Actively maintains optimal exhaust flow and prevents power-robbing exhaust gas escape.
  • Enhanced Engine Efficiency: Contributes to proper air/fuel mixture, improved combustion, and effective emissions control.
  • Durable Construction: Built to withstand high temperatures, aggressive vibrations, and corrosive exhaust gases for long-term reliability.
  • OEM Quality: Genuine Chevrolet Performance part for trusted fitment, performance, and peace of mind.

Critical for LS-Series Exhaust System Integrity

Whether you're replacing a failing, worn-out gasket, installing brand-new performance headers, or undertaking a comprehensive rebuild of your GM LS-Series engine, the Chevrolet Performance MLS Exhaust Manifold Gasket is a vital component for ensuring the integrity and peak performance of your entire exhaust system. Its precision engineering and robust materials make it the definitive choice for maintaining peak engine performance and preventing costly, frustrating exhaust leaks. Invest in the best to keep your LS engine breathing freely, powerfully, and efficiently. Find this essential exhaust gasket and more premium performance parts at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Chevrolet Performance Parts

Chevrolet Performance Parts engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Chevrolet Performance Parts lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Seal Your Exhaust System with Chevrolet Performance Multi-Layer Steel Manifold Gasket

Eliminate frustrating exhaust leaks and restore optimal engine performance with the Chevrolet Performance Multi-Layer Steel (MLS) Exhaust Manifold Gasket (MPN 12617944). Designed specifically for GM LS-Series engines featuring 1.870-inch round ports, this gasket is absolutely crucial for maintaining proper exhaust flow, preventing power loss, and ensuring your engine runs efficiently and cleanly. Exhaust leaks can lead to a cascade of issues, including reduced horsepower, increased emissions, an unpleasant exhaust smell within the cabin, and even potential damage to other engine components, making a high-quality, reliable seal absolutely essential.

Advanced MLS Construction for Extreme Durability

This premium gasket features a state-of-the-art Multi-Layer Steel (MLS) construction, renowned throughout the performance industry for its exceptional durability and unparalleled ability to withstand extreme temperatures and pressures. Unlike traditional composite gaskets that can degrade, crack, or blow out over time, the MLS design comprises multiple layers of precisely embossed steel, creating a robust and resilient seal that conforms perfectly to mating surfaces. This advanced engineering ensures a long-lasting, leak-free connection between your exhaust manifold and cylinder head, even under the most demanding driving conditions, including forced induction setups, high-RPM racing applications, and heavy-duty use.

Key Features & Performance Benefits:

  • Multi-Layer Steel (MLS) Design: Provides superior sealing integrity and extreme heat resistance for demanding applications.
  • 1.870-inch Round Port Specific: Ensures a precise, perfect fit for compatible GM LS-Series engines, optimizing flow.
  • Prevents Exhaust Leaks: Actively maintains optimal exhaust flow and prevents power-robbing exhaust gas escape.
  • Enhanced Engine Efficiency: Contributes to proper air/fuel mixture, improved combustion, and effective emissions control.
  • Durable Construction: Built to withstand high temperatures, aggressive vibrations, and corrosive exhaust gases for long-term reliability.
  • OEM Quality: Genuine Chevrolet Performance part for trusted fitment, performance, and peace of mind.

Critical for LS-Series Exhaust System Integrity

Whether you're replacing a failing, worn-out gasket, installing brand-new performance headers, or undertaking a comprehensive rebuild of your GM LS-Series engine, the Chevrolet Performance MLS Exhaust Manifold Gasket is a vital component for ensuring the integrity and peak performance of your entire exhaust system. Its precision engineering and robust materials make it the definitive choice for maintaining peak engine performance and preventing costly, frustrating exhaust leaks. Invest in the best to keep your LS engine breathing freely, powerfully, and efficiently. Find this essential exhaust gasket and more premium performance parts at GGCRACING.

Product Details

Product Description

About Chevrolet Performance Parts

Chevrolet Performance Parts engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Chevrolet Performance Parts lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Seal Your Exhaust System with Chevrolet Performance Multi-Layer Steel Manifold Gasket

Eliminate frustrating exhaust leaks and restore optimal engine performance with the Chevrolet Performance Multi-Layer Steel (MLS) Exhaust Manifold Gasket (MPN 12617944). Designed specifically for GM LS-Series engines featuring 1.870-inch round ports, this gasket is absolutely crucial for maintaining proper exhaust flow, preventing power loss, and ensuring your engine runs efficiently and cleanly. Exhaust leaks can lead to a cascade of issues, including reduced horsepower, increased emissions, an unpleasant exhaust smell within the cabin, and even potential damage to other engine components, making a high-quality, reliable seal absolutely essential.

Advanced MLS Construction for Extreme Durability

This premium gasket features a state-of-the-art Multi-Layer Steel (MLS) construction, renowned throughout the performance industry for its exceptional durability and unparalleled ability to withstand extreme temperatures and pressures. Unlike traditional composite gaskets that can degrade, crack, or blow out over time, the MLS design comprises multiple layers of precisely embossed steel, creating a robust and resilient seal that conforms perfectly to mating surfaces. This advanced engineering ensures a long-lasting, leak-free connection between your exhaust manifold and cylinder head, even under the most demanding driving conditions, including forced induction setups, high-RPM racing applications, and heavy-duty use.

Key Features & Performance Benefits:

  • Multi-Layer Steel (MLS) Design: Provides superior sealing integrity and extreme heat resistance for demanding applications.
  • 1.870-inch Round Port Specific: Ensures a precise, perfect fit for compatible GM LS-Series engines, optimizing flow.
  • Prevents Exhaust Leaks: Actively maintains optimal exhaust flow and prevents power-robbing exhaust gas escape.
  • Enhanced Engine Efficiency: Contributes to proper air/fuel mixture, improved combustion, and effective emissions control.
  • Durable Construction: Built to withstand high temperatures, aggressive vibrations, and corrosive exhaust gases for long-term reliability.
  • OEM Quality: Genuine Chevrolet Performance part for trusted fitment, performance, and peace of mind.

Critical for LS-Series Exhaust System Integrity

Whether you're replacing a failing, worn-out gasket, installing brand-new performance headers, or undertaking a comprehensive rebuild of your GM LS-Series engine, the Chevrolet Performance MLS Exhaust Manifold Gasket is a vital component for ensuring the integrity and peak performance of your entire exhaust system. Its precision engineering and robust materials make it the definitive choice for maintaining peak engine performance and preventing costly, frustrating exhaust leaks. Invest in the best to keep your LS engine breathing freely, powerfully, and efficiently. Find this essential exhaust gasket and more premium performance parts at GGCRACING.

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