COMETIC SKU: 68-9523

Cometic Panhead/Shovelhead/Evo Big Twin Engine Seal 5-Pack - Harley Big Twin

$87.000,00
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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 engine seal is engineered as an OEM replacement for Panhead, Shovelhead, and Evolution Big Twin V-twin engines. It comes in a practical 5-pack, providing enough seals for a complete engine rebuild or multiple service applications. This seal is crucial for maintaining the integrity and leak-free operation of your classic powerplant.

Why riders pick this

  • OEM-specification replacement for V-twin engine seals
  • Fits Panhead, Shovelhead, and Evolution Big Twin engines
  • Ensures reliable sealing for critical engine interfaces
  • 5-pack quantity for rebuilds or multiple service jobs

When you're diving into the heart of your Panhead, Shovelhead, or Evolution Big Twin, using reliable sealing components is non-negotiable. This Cometic engine seal is manufactured to OEM specifications, ensuring a precise fit and durable performance across critical engine interfaces. It's designed to withstand the demanding conditions within your V-twin engine, preventing leaks and maintaining optimal pressure.

Reliable Sealing for Engine Longevity

  • OEM-specification replacement for factory engine seals
  • Compatible with Panhead, Shovelhead, and Evolution Big Twin engines
  • Helps prevent oil leaks at critical engine points
  • Convenient 5-pack for comprehensive engine service

Essential for Any Engine Project

Whether you're performing routine maintenance, addressing a leak, or undertaking a full engine rebuild, having access to quality seals is vital. This Cometic 5-pack ensures you have the necessary components to complete your project confidently. Designed for straightforward installation, these seals help protect your investment and keep your classic Harley-Davidson or Indian Motorcycle running strong and leak-free.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9523
  • Quantity: 5 per pack
  • Weight: 0.34 lbs

Common questions

Is this an OEM equivalent or an aftermarket upgrade?

This Cometic seal is an OEM-specification replacement, meaning it's manufactured to match the original factory engineering standards for a direct fit and comparable performance.

How many seals are included in each pack?

Each pack contains 5 individual seals, providing enough for a single engine rebuild with spare parts, or for multiple smaller service jobs.

Will this seal fit both Harley-Davidson and Indian Motorcycle V-twins?

Yes, this seal is designed to fit V-twin engines across Harley-Davidson and Indian Motorcycle platforms that utilize Panhead, Shovelhead, and Evolution Big Twin engine specifications. Always confirm fitment for your specific model.

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
SKU68-9523
WEIGHT0.34 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.87
15 RATINGS
5★ 13
4★ 2
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Jan 16, 2020

Almost identical to OEM. Good fit. I did miss that they are sold as each and not as a pair. Small detail and my fault but it did slow my project down a bit.

— Anonymous
✓ VERIFIED
Oct 18, 2021

Great seals and gaskets do the job once when you use quality gaskets

— Anonymous
✓ VERIFIED
Sep 26, 2019

Seal good and I haven't had any issues..

— Anonymous
✓ VERIFIED
Jun 27, 2025

It worked like it was suppose to, delivery was quick. <br />Pleased.

— Lloyd S
✓ VERIFIED
Dec 19, 2023

Just what I needed

Needed these when changing out intake manifold. They worked perfect for my ‘03 sporty.

— Carlos L
✓ VERIFIED
Jun 12, 2023

Cometic from here on out

These seals are the only ones I'll use. others came close but, for me, these are best.

— Vincent S