✓ 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: 68-9886
Cometic Evo Big Twin EST Gasket Kit - & Seal BIG Twin KIT — Harley-Davidson (1984-1999)
$135.74
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Cometic Evo Big Twin EST gasket kit includes all gaskets, seals, washers, and o-rings needed for a complete engine overhaul on Evo Big Twin V-twins. Kit features MLS head gaskets, steel Viton-coated base gaskets, blue Viton valve stem seals, and AFM material for reliable sealing across all engine temperatures.
Features
- MLS head gaskets
- Steel Viton-coated base gaskets
- Blue Viton valve stem seals
- AFM material components
- Complete kit — all gaskets and seals included
Specifications
- Brand: Cometic
- Manufacturer Part #: C9886
- Weight: 1.15 lbs
Fitment
Fits Evo Big Twin V-twin engines.
Frequently Asked Questions
What's included in this kit?
All gaskets, seals, washers, and o-rings needed for a complete engine overhaul on Evo Big Twin motors.
Will this fit my Twin Cam or Milwaukee-Eight engine?
No — this kit is specific to Evo Big Twin engines. Twin Cam and Milwaukee-Eight require different gasket kits.
Are the head gaskets MLS or conventional?
This kit includes MLS (multi-layer steel) head gaskets for improved sealing and durability.
Do I need to order valve stem seals separately?
No — blue Viton valve stem seals are included in the kit.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9886 |
| WEIGHT | 1.15 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?
