Cometic Chevy 366 Mark-IV Big Block V8 Top End Gasket Kit-4.000in Bore-.040in MLS Cyl Head Gasket

Name: Cometic Chevy 366 Mark-IV Big Block V8 Top End Gasket Kit-4.000in Bore-.040in MLS Cyl Head Gasket
Brand: Cometic Gasket
SKU: C006 PRO1005T-4000-040
Price: 425.50 USD
Availability: InStock

$425.50

SKU: C006 PRO1005T-4000-040

In Stock

Ships by Jun 19

Free Shipping

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Description

Cometic StreetPro Kits are designed for budget-minded street-rodders looking for all necessary gaskets and seals for their engine rebuild. These kits prioritize quality gasket materials, including MLS, AFM, Aramid Fiber, and Armor Clad. Head gaskets, which sit between the engine block and cylinder head, prevent the mixture of gases and oils with the cooling system. This kit is essential for proper engine function during rebuilds or maintenance, and highly recommended when increasing horsepower. All Cometic products are made in the United States with American-manufactured materials.

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

Brand	Cometic Gasket
Part Number	C006 PRO1005T-4000-040

Videos

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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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