What does the .040in measurement refer to on this gasket?

The .040in measurement indicates the thickness of the gasket. This specific thickness is designed for certain engine builds and helps ensure proper sealing and compression ratios.

Do I need to use any RTV sealant with this Cometic gasket?

No, sealants are not required with this Cometic MLS exhaust gasket. The multi-layer steel design is engineered to create a tight seal on its own, even with different combinations of cylinder head and exhaust manifold materials.

What vehicles does this Cometic exhaust gasket fit?

This gasket is designed for Dodge trucks equipped with the 5.9L 12v Cummins engine. It fits models like the D250, D350, W250, W350 from 1989-1993 and the Ram 2500, and Ram 3500 from 1994-1998.

Cometic Dodge Cummins 5.9L 12v .040in MLS 3 Port Exhaust Gaskets

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Specifications

Brand: Cometic Gasket
Part #: C5725-040
UPC: 191070043360

Cometic Dodge Cummins 5.9L 12v .040in MLS 3 Port Exhaust Gaskets

Name: Cometic Dodge Cummins 5.9L 12v .040in MLS 3 Port Exhaust Gaskets
Brand: Cometic Gasket
Price: 52.56 USD
Availability: InStock

$52.56

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Cometic Dodge Cummins 5.9L 12v .040in MLS 3 Port Exhaust Gaskets. Multi-layer steel construction resists corrosion and won't burn through.

Key Features

Fits 1989-1998 Dodge Ram 2500, 3500, D250, D350, W250, and W350 models with the 5.9L 12v Cummins engine.
Multi-Layer Steel (MLS) construction resists corrosion and maintains torque under extreme cylinder pressures.
Designed to prevent burning through or being pushed out of place.
No sealants are required for installation.
Covers 3 exhaust ports for a complete seal.
The gasket is .040 inches thick.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

If you're working on the exhaust manifold of your Dodge Cummins 5.9L 12v diesel, a good gasket is crucial to prevent leaks and ensure proper performance. This Cometic Multi-Layer Steel (MLS) exhaust gasket is built to handle the high pressures common in these engines. It's designed to seal three exhaust ports, making it a direct fit for many Dodge trucks from the late 80s through the late 90s.

Cometic's MLS design uses multiple layers of steel to create a strong seal that maintains its torque even under extreme cylinder pressures. Unlike some other gasket materials, these won't burn through or get pushed out of place, and they're made to withstand different combinations of cylinder head and exhaust manifold materials. You won't need any extra sealants either, as the gasket itself is designed to create a tight seal right out of the box. This means a cleaner installation and a more reliable seal for your exhaust system.