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Fel-Pro 1143 - Fel-Pro PermaTorque Multi-Layer Steel Head Gaskets



Fel-Pro 1143 - Fel-Pro PermaTorque Multi-Layer Steel Head Gaskets
Fel-Pro 1143 - Fel-Pro PermaTorque Multi-Layer Steel Head Gaskets

JEGS Part Number: 375-1143

PermaTorque MLS Head Gasket
  • Small Block Chevy
  • Gasket Bore: 4.165''
  • Compressed Thickness: .041''
  • Compressed Volume: 9.2cc
    • $63.99 Ships

    Fel-Pro 1143 Details

    Small Block Chevy

    Steam holes for use on 400ci blocks

    Fel-Pro PermaTorque Multi-Layer Steel Head Gaskets

    Modern Cylinder Heads Require a New Type of Gasket

    Why use a Fel-Pro Multi-Layer Steel Cylinder Head Gasket? Because more power per cylinder, higher operating temperatures, and thinner head and block castings demand a modified gasket. MLS Gaskets are stronger, more forgiving, and capable of sealing despite movement between the head and block. Such motion results from: lighter, thinner aluminum head castings that are more susceptible to thermal expansion; computer controls that can dramatically increase engine output; reduced clamping force that prevents stress points and cylinder bore distortion.

    MLS Technology was developed to overcome sealing challenges. The number of layers in an MLS Gasket ranges from two to five, depending on the engine's sealing characteristics. Generally, the more layers, the more motion the gasket endures. There are multiple solid layers of heat-treated stainless steel separated by a very thin rubber coating, and the layers are either active (absorbing motion between the head and block) or shim (giving the gasket its correct compressed thickness). Gaskets are sold each.

    Features
  • Stainless steel maintains shape
  • Survives higher combustion pressure
  • Withstands "scrubbing" between head and block
  • Functions at a wider range of operating temperatures
  • Strategically-placed sealing beads eliminate leak paths
  • "Stopper" layer provides superior primary combustion seal

    Additional Information

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  • Items similar to Fel-Pro 1143

    Fel-Pro 1143

    Bore (in.)
    4.165
    Bore (mm)
    105.791
    Calculator
    Compression Calculator
    Compressed Thickness (in.)
    0.041
    Compressed Volume (cc)
    9.154
    Lock Wire
    No
    Quantity
    Sold individually
    Gasket Material
    Multi-layer steel
    Manufacturer's Part Number:
    1143
    Rated 5 out of 5 by from sbc mls Got them a few weeks ago. Good shape no flaws. Pro tip for people using any MLS gasket, the block and heag surface have to be perfectly machined flat and as smooth as possible, or leaks may occur. Small lather of Permatex doesn't hurt also.
    Date published: 2016-04-06
    Rated 1 out of 5 by from Horrible MLS Fel Pro Gasket Horrible, I have less then a hour on my recently built 400 and I have to take apart because oil is leaking between the layers of the gasket. Did research online and found I am not the only one with this problem. Will never used again.
    Date published: 2014-12-25
    • 2016-05-06T11:41CST
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