COMETIC SKU: 68-9179F5

Cometic Evo Big Twin/Twin Cam Primary Housing Gasket 5-Pack - Harley Big Twin

$200.71
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About Cometic

Cometic Gasket manufactures multi-layer steel head gaskets and complete gasket kits in Concord, Ohio. On a built V-twin running higher compression or a big-bore kit, the MLS head gasket is what keeps the top end sealed — which is why Cometic is the default spec on so many engine builds.

Keep your primary sealed and your V-twin running strong with this Cometic Primary Housing Gasket 5-Pack for Harley Big Twin engines. These OEM-replacement gaskets are engineered to create a robust seal between the primary cover and crankcase, effectively preventing oil leaks at this critical junction. Ideal for shops or riders who perform frequent maintenance.

Why riders pick this

  • 5-pack of primary housing gaskets
  • OEM-specification design for Evo and Twin Cam Big Twins
  • Prevents oil leakage from the primary cover
  • Convenient for multiple services or keeping spares

For any Harley Big Twin owner, a reliable primary seal is essential for performance and cleanliness. This 5-pack of Cometic primary housing gaskets ensures you always have a quality replacement on hand. Designed to meet OEM specifications, these gaskets are built to endure the heat, vibration, and demands of both Evo and Twin Cam Big Twin engines, providing a leak-free primary drive.

Bulk Value for Big Twin Maintenance

  • OEM-specification gasket design for precise fitment
  • Specifically for Evo and Twin Cam Big Twin engines
  • Convenient 5-pack quantity for multiple services or spares
  • Direct replacement for primary housing seal

Smart Investment for Your Harley

Whether you're a professional mechanic or a dedicated DIY rider, having a supply of crucial gaskets saves time and ensures consistent quality. This 5-pack of Cometic primary housing gaskets is a smart investment, allowing you to confidently tackle primary cover removals for maintenance, inspection, or upgrades on your Harley-Davidson Big Twin without waiting for parts. Always confirm fitment for your specific model before installation.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9179F5
  • Length: 23 in
  • Width: 13.07 in
  • Height: 0.47 in
  • Weight: 0.05 lbs
  • Quantity: 5 per pack

Common questions

Will these primary gaskets fit Sportster models?

No, these Cometic primary gaskets are specifically designed for Big Twin Evo and Twin Cam engines only. Sportster primary housings require a different part number for proper fitment.

Why are these gaskets sold in a 5-pack?

This 5-pack offers convenience for riders or shops that perform frequent maintenance, rebuild multiple engines, or prefer to keep spare gaskets on hand for future service needs.

Is it necessary to replace the primary gasket during routine service?

It is highly recommended to replace the primary gasket every time the primary cover is removed for maintenance, inspection, or parts replacement to ensure a proper and leak-free seal.

Ordering from Vtwinbikers

  • Brand new, sourced through authorized US distribution — never used, never grey-market.
  • Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
  • Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
BRANDCometic
TYPEGaskets/Seals
SKU68-9179F5
WEIGHT0.05 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.71
14 RATINGS
5★ 11
4★ 2
3★ 1
2★ 0
1★ 0
✓ VERIFIED
Apr 1, 2024

keeps them lookin shiny

keeps the oil on the right side

— Frank N
✓ VERIFIED
Dec 4, 2023

Easy to install. Good quality and price. Does what it is supposed to do

— Brendan S
✓ VERIFIED
Apr 9, 2019

Very good quality/value for the price, I would buy them again.

— Anonymous
✓ VERIFIED
May 1, 2016

Good gasket, I like these because they are the same thickness as factory, and do not change the end play on the cam and breather

— Anonymous
✓ VERIFIED
Apr 29, 2015

Decent gasket. Sticks out of the nosecone cover a bit at the top as it doesn't follow the nose cone shape precisely. Seals well.

— Anonymous
✓ VERIFIED
Jun 22, 2014

easy to replace just like oem

— Anonymous