✓ VERIFIED
May 16, 2026
not what I needed. description wasn't very clear but not worth sending back. oh well just have to be more careful next time
COMETIC
SKU: 68-9551
Cometic Evo Big Twin Head/Base Gasket - 2/PK — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)
$31.55
Free shipping on orders $99+ · Best value guarantee
affirm
From $2.62/mo with Affirm.
See if you prequalify
IN STOCK
— Ships within 24 hours
Free Shipping on orders $99+
Best Value Guarantee
30-Day Returns — see policy
Authorized Dealer — sourced direct
Cometic head and base gasket set for Harley-Davidson Evo Big Twin engines, sold as a 2-pack. OEM-quality replacement gaskets engineered to seal combustion pressure and oil passages on V-twin motors.
Features
- 2-pack quantity
- OEM-grade gasket material
- For Evo Big Twin head and base applications
Specifications
- Brand: Cometic
- Manufacturer Part #: C9551
- UPC: 191070005184
- Quantity: 2 per pack
- Length: 6.05 in
- Width: 6.95 in
- Height: 0.3 in
- Weight: 0.01 lbs
Fitment
Fits Harley-Davidson Evo Big Twin engines. Verify your engine type before ordering — this part is not compatible with Shovelhead or Milwaukee-Eight motors.
Frequently Asked Questions
Will this fit my Harley Big Twin?
This is for Evo Big Twin engines. Shovelhead and Milwaukee-Eight motors require different gasket sets. Confirm your engine type before ordering.
Why does this come as a 2-pack?
Two gaskets allow you to service both head and base in a single purchase — the most common gasket service for Evo Big Twin rebuilds.
Do I need any special tools or sealant to install?
Follow the engine manufacturer's torque specs and use the recommended sealant if specified in your service manual. New gaskets should always be installed dry unless otherwise directed.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9551 |
| WEIGHT | 0.01 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.36
14 RATINGS
5★
11
4★
0
3★
1
2★
1
1★
1
✓ VERIFIED
Mar 8, 2026
Gasket
Working fine was for my brother's bike
✓ VERIFIED
Oct 25, 2024
Works Fine at a lower cost
I usually have an OEM from Harley Davidson, I have used this twice on my 04 Electraglide, no leaks or issues. At a much lower price.
✓ VERIFIED
Jun 8, 2024
A mediocre gasket
I didn’t use this gasket after removing the derby and seeing the Harley gasket that I removed. No comparison in quality. I ended up going to the local dealer and bought an O.E. gasket.
✓ VERIFIED
Jun 6, 2023
A good buy
The gasket fit nicely and no leaks so far . The fitment was spot on .
✓ VERIFIED
May 4, 2023
There is nothing on them indicating they are actually Cometic gaskets. Are they Substitutes?
