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Fel-Pro P1003 S/B Chevy 265-400 Steel Ring Head Gasket 4.166 Inch Bore

Sold in Quantity:
Material Type:
Multiple Layer Steel
Compressed Thickness:
Gasket Bore:
Gasket can be used on 400 race engines, up to 4.155" maximum bore with minimal chamfer. This gasket also works with 350 and smaller small block chevys. (Per FelPro)
Fel-Pro P1003 S/B Chevy 265-400 Steel Ring Head Gasket 4.166 Inch Bore

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Q & A (1)

What's in the Box


These Fel-Pro gaskets work with both cast iron and aluminum heads. Pre-flattened steel wire ring gaskets have the strength of steel wire sealing with minimum brinelling of aluminum heads. Pre-flattened copper wire ring gaskets will not brinell aluminum heads. They offer superior heat dissipation. Multi-layer steel gaskets offer current leading-edge technology and provide a long-term, leakproof seal called Perma Torque MLS.

  • Gaskets are sold each
  • Pre-flattened steel wire
  • Nominal compression thickness: .041"
  • Compressed volume: 9.1 cc
  • 4.166" bore gaskets can be used on 400 race engines with up to 4.155" max bore with minimal chamfer
  • When using aluminum heads, we recommend gaskets with soft copper wire rings (such as 344-1010). This ensures that the aluminum head is not "scarred" by the combustion seal. Shim style 344-1094 will also work well with aluminum heads.

Head Gasket Application (JPEG)

Speedy Tip for Proper Head Gasket Seal (GIF)  

Item Details

4.166" bore, .041" thick, 9.1 cc volume

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