✓ VERIFIED
Apr 1, 2024
keeps them lookin shiny
keeps the oil on the right side
COMETIC
SKU: 68-9997F1
Cometic Twin Cam Inspection/Derby Cover Gasket Single - Harley Big Twin
$8.12
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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.
A weeping inspection or derby cover is an easy fix with the right gasket. This Cometic Twin Cam Inspection/Derby Cover Gasket is a direct replacement, designed to perfectly seal your Big Twin V-twin engine. It's built to prevent leaks and maintain the clean look of your engine case.
Why riders pick this
- Direct replacement for Twin Cam inspection/derby covers
- Seals primary cover to prevent oil leaks
- Engineered for Harley Big Twin V-twin engines
- Single pack for individual service needs
This Cometic Twin Cam inspection/derby cover gasket is a direct replacement for Harley-Davidson Big Twin V-twin engines. Designed to seal the inspection cover or derby cover, this single-pack gasket ensures a leak-free joint and prevents oil weeping. It's an essential component for routine maintenance or when upgrading your cover, ensuring proper sealing and peace of mind.
Precision Sealing for Your Big Twin
- Direct OEM replacement for OE# 25416-99C
- Specifically designed for Twin Cam Big Twin engines
- Ensures a tight, leak-free seal for inspection or derby covers
- Engineered with Cometic gasket technology for V-twin reliability
Maintain a Leak-Free Primary
Replacing the inspection or derby cover gasket is a simple task that prevents messy oil leaks and keeps your primary looking sharp. This Cometic gasket provides the precision fit and durable materials needed for long-term sealing performance. It's a critical component for any Twin Cam owner, ensuring that every service or customization project finishes with a professional, leak-free result. Always confirm your bike's specific OEM gasket part number to ensure correct fitment.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9997F1
- OE Reference: 25416-99C
- Length: 8.5 in
- Width: 8 in
- Height: 0.25 in
- Weight: 0.02 lbs
- Quantity: 1 per pack
Common questions
What does this Cometic gasket seal on my Harley-Davidson?
This gasket is designed to seal the inspection cover or derby cover on your Twin Cam Big Twin engine, preventing oil leaks from the primary.
How do I confirm this gasket will fit my specific model year?
This gasket is a direct replacement for OE# 25416-99C. The best way to confirm compatibility is to check your bike's original equipment gasket part number.
Is this gasket difficult to install?
No, installation is straightforward. You typically unbolt the cover, remove the old gasket, clean the mating surfaces, and install the new gasket before rebolting the cover.
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.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9997F1 |
| WEIGHT | 0.02 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★
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1
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✓ VERIFIED
Dec 4, 2023
Easy to install. Good quality and price. Does what it is supposed to do
✓ VERIFIED
Apr 9, 2019
Very good quality/value for the price, I would buy them again.
✓ 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
✓ 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.
✓ VERIFIED
Jun 22, 2014
easy to replace just like oem
