COMETIC SKU: 68-9173

Cometic Primary Housing Gasket & Seal Kit - Harley Evo Big Twin & Twin Cam

$373.000,00
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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.

This Cometic primary housing gasket and seal kit is engineered for Evolution and Twin Cam big twin engines, providing a critical seal for your primary cover. Designed to withstand engine heat and pressure, this kit ensures your primary drive remains leak-free. It's an essential component for any primary service or rebuild.

Why riders pick this

  • OEM-specification primary gasket design
  • Fits Evolution and Twin Cam big twin engines
  • Includes primary housing gasket and seals
  • Prevents oil leaks from the primary cover
  • Essential for primary drive maintenance

A leaking primary can be a messy problem, but with this Cometic primary housing gasket and seal kit, you can ensure a tight, reliable seal. Specifically designed for Evolution and Twin Cam big twin engines, these OEM-specification components are built to perform under the demanding conditions of your Harley. Whether you're replacing a worn gasket during routine maintenance or buttoning up a new clutch installation, this kit provides the confidence of a dry primary.

Secure Your Primary Drive

  • OEM-specification gasket design for a precise fit and reliable seal
  • Specifically fits Evolution and Twin Cam big twin engines
  • Includes both the primary housing gasket and seals for a complete job
  • Engineered to prevent oil leaks from the primary cover under heat and pressure
  • Ensures proper containment of primary fluid for optimal clutch and chain performance

Essential for Primary Service

Anytime you're opening up the primary on your Evo or Twin Cam, replacing the gasket and seals is good practice. This Cometic kit makes it easy, providing all the necessary components in one package. A properly sealed primary protects your internal components and keeps your bike looking clean. Trust Cometic for the quality parts you need to maintain your V-twin.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9173
  • UPC: 191070004705
  • Weight: 0.05 lbs

Common questions

What Harley-Davidson engines does this primary gasket kit fit?

This Cometic primary housing gasket and seal kit is designed for Evolution (Evo) and Twin Cam big twin engines. It does not fit Sportster models.

What components are included in this kit?

The kit includes the primary housing gasket and necessary seals required for a complete primary cover installation, ensuring a leak-free seal.

Do I need to use additional gasket sealant with this kit?

Cometic gaskets are engineered for direct installation. Always follow Harley-Davidson's or your engine manufacturer's specific torque and assembly specifications. Additional sealant is typically not required unless explicitly specified in your service manual.

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
SKU68-9173
WEIGHT0.05 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.73
11 RATINGS
5★ 8
4★ 3
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Oct 4, 2025

Rocker gaskets

Great qualities to these gaskets. Have used them extensively!

— THOMAS B
✓ VERIFIED
Sep 29, 2025

Cometic gaskets

I used james gaskets before i got cometic and they didn’t last long and had to pay someone to replace them again so I went with cometic and so far so good im going to stick with this brand from now on

— Shane P
✓ VERIFIED
Mar 18, 2024

Magical

This gasket worked perfectly! ALTHOUGH, it would not have been needed had the James Engine gasket set had the correct gasket. The bolt holes were large on the set(I suppose fore different engine applications) which introduced an oil leak issue after I rebuilt my engine. <br />The COMETIC GASKET fit my 103 perfectly and ...tada!..magically...no leaks!

— Arthur v
✓ VERIFIED
Jul 7, 2019

Fits, works, looks like good material. Would use again if needed.

— Anonymous
✓ VERIFIED
Apr 18, 2016

Great product. No extra material necessary and no leaks after using.

— Anonymous
✓ VERIFIED
Oct 31, 2015

Great gaskets worked perfect. Prefer James gaskets but they were not available. Theses got the job done.

— Anonymous