✓ 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: 68-9588
Cometic Twin Cam EST Gasket Kit — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Road King (1999-2017)
$43.89
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Cometic Twin Cam EST gasket kit supplies every gasket, seal, washer, and o-ring needed for a complete engine overhaul on Twin Cam models. Includes MLS head gaskets, steel Viton-coated base gaskets, blue Viton valve stem seals, and AFM material for reliable sealing under high performance.
Features
- MLS head gaskets
- Steel Viton-coated base gaskets
- Blue Viton valve stem seals
- AFM material gaskets
- Complete overhaul kit — all gaskets and seals included
Specifications
- Brand: Cometic
- Manufacturer Part #: C9588
- UPC: 191070018078
- Weight: 0.38 lbs
- Package Dimensions: 9.4 in L × 7.9 in W × 2.6 in H
Fitment
Fits Harley-Davidson Twin Cam EST engines.
Frequently Asked Questions
What's included in this kit?
All gaskets, seals, washers, and o-rings needed for a complete engine overhaul — head gaskets, base gaskets, valve stem seals, and AFM material.
Will this fit my Twin Cam engine?
Yes — this kit is designed specifically for Harley-Davidson Twin Cam EST engines.
Are MLS head gaskets better than standard gaskets?
MLS (Multi-Layer Steel) gaskets handle higher boost and cylinder pressures more reliably than single-layer designs, making them ideal for performance builds.
Do I need any other gaskets for a top-end rebuild?
This kit covers the essential gaskets and seals for a complete overhaul. Check your service manual for any application-specific additions.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9588 |
| WEIGHT | 0.38 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?
