Gaskets and Seals Engine Gaskets and Seals

Cometic Gasket

Cometic Gasket Cummins 5.9L ISB .056in MLX Cylinder Head Gasket 4.100in Bore

$271.04

SKU: C006 C5855-056

In Stock
In Stock
Ships by Jun 15
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Cometic C5855-056 is a Multi-Layer Steel (MLS) cylinder head gasket designed for the Cummins 5.9L ISB engine. It features a .056-inch thickness and a 4.100-inch bore.

Constructed from multiple embossed layers of stainless steel with an outer Viton rubber coating, this gasket offers maximum sealing performance for high-output engines and requires no sealants. MLS gaskets are suitable for aluminum-to-aluminum and aluminum-to-cast iron head and block combinations.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandCometic Gasket
Part NumberC006 C5855-056

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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