JavaScript Disabled

Your JavaScript appears to be disabled. JavaScript is necessary for various functions, such as order checkout, to operate on this web site. Please ensure that JavaScript is enabled.

Outdated Internet Browser Detected

Your web browser appears to be out of date. Soon you will not be able to create a secure connection to our web site using TLS 1.0. Please upgrade your browser from current version( ). Learn more about TLS.

In-Store Pickup Location

Cometic MLS Head Gaskets H1075SP4040S

Cometic H1075SP4040S - Cometic MLS Head Gaskets
  • Cometic MLS Head Gaskets

    Cometic MLS Head Gaskets

Now Playing: Cometic MLS Head Gaskets

Loading media

In progress

Head Gasket, 4.155 in. Bore, .040 in. Compressed Thickness, Chevy, Small Block, Each

Estimated Ship Date: Loading...Processing Tomorrow Would you rather pick it up? Select Location

Hazardous Material Warning
WARNING: This product can expose you to a chemical such as Carbon Black that is known to the state of California to cause cancer. For more information, visit

View Similar Products

Brand: Cometic

Manufacturer's Part Number: H1075SP4040S

Part Type: Head Gaskets

Product Line: Cometic MLS Head Gaskets

Summit Racing Part Number: CGT-H1075SP4040S

Bore (in): 4.155 in.

Bore (mm): 105.500mm

Gasket Material: Multi-layer stainless steel

Compressed Thickness (in): 0.040 in.

Compressed Volume (cc): 8.888cc

Lock Wire: No

Quantity: Sold individually.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Calculator Compression Calculator

Cometic MLS head gaskets are constructed from multiple layers of stainless steel for strength and contain load-controlled embossments that conform load distribution across the sealing area. This creates an exceptional seal by requiring less clamp load--resulting in less bore distortion. The stainless steel outer layers utilizing FKM (Viton®) rubber coating, a high-temperature and chemical-resistant polymer. A topcoat of PTFE aids in resistance to fret and increased cold sealing. MLS head gaskets are available for most aftermarket cylinder heads; as with all of Cometic's MLS head gaskets, no sealants or re-torque is required.

Questions & Answers Ask a Product Question

Are these manufactured with steam holes? If not, can they be drilled without compromising the gasket?

Asked by ERIC on March 17, 2018


I have drilled them with no problems, steam holes on the intake side, are not needed, only drill the holes on the exhaust sides...

JAMES R from SC answered on March 18, 2018

Answer This Question


The description of these head gaskets state they are for a 4.155" bore but it claims to be for a cylinder bored 0.040 over. That would make it 4.165" so which is it?

Asked by JOSEPH on July 10, 2017


it is .030" over but the compression thickness is .040"

JEFF from NV answered on July 17, 2017

Answer This Question

Most Helpful Reviews Review This Product

Some parts are not legal for use in California or other states with similar laws / regulations

Back To Results
Email this page
Sign Up for Email X