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Cometic C9771 EST Big Bore Top End Gasket Kit 3.75" Harley Big Twin

Manufacturer

Picture for manufacturer Cometic

Part Number

C9771
5 reviews
Sale Price

$112.39

2 left at this price

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Usually delivered within 2 days

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Product Details

The Cometic C9771 EST (Extreme Sealing Technology) Big Bore Top End Gasket Kit is engineered for high-performance Harley-Davidson Big Twin applications with a 3.75" bore. This comprehensive gasket set provides everything needed to rebuild your engine's top end from the cylinder base upward.

Key Features:

  • EST technology with embossed stainless steel head, base, and rocker gaskets covered with proprietary rubber material
  • Advanced heat dissipation design draws heat away from the combustion ring and distributes it evenly across the gasket surface
  • Eliminates hot spots and prevents gasket failure for reliable long-term sealing
  • Complete kit includes all necessary gaskets, seals, and O-rings for a comprehensive top end rebuild
  • 3.75" big bore size for performance applications
  • Made in the U.S.A.

Cometic's EST gaskets combine advanced materials and engineering to deliver superior sealing performance in demanding V-Twin applications. The proprietary rubber coating ensures optimal compression while the stainless steel core provides strength and durability.

First time here feel there should be cheaper shipping methods

So good so far, txs

I ordered the bully dog system and chose the express shipping ( which I could afford due to the low price) option. The order arrived exactly as described in the amount of time that it was promised in. Autoplicity offered the lowest price I could find on the internet. I highly recommend them and look forward to ordering from them again in the future!

Cheaper than going through alta

Very quick.

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