✓ 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.
COMETIC
SKU: 68-10220-030
Cometic Milwaukee-Eight EST Gasket Kit 4.125" Bore - Harley Milwaukee-Eight CVO
$738.000,00
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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.
When undertaking an engine rebuild or significant top-end work on your high-performance Milwaukee-Eight CVO, a premium gasket kit is essential. This Cometic EST (Extreme Sealing Technology) kit delivers the robust sealing required for larger bore M8 engines. It provides a complete set of components to ensure a leak-free and reliable assembly.
Why riders pick this
- Complete engine overhaul gasket set
- MLS head gaskets ideal for high-compression
- Steel Viton-coated base gaskets included
- Blue Viton valve stem seals for valve train
- AFM material for comprehensive engine sealing
- Designed for Milwaukee-Eight 4.125" bore
This Cometic Milwaukee-Eight EST Gasket Kit is specifically engineered for Harley-Davidson and Indian Motorcycle V-twin engines with a 4.125-inch bore, commonly found in 117 cubic inch CVO models. It's a complete overhaul kit, supplying every gasket, seal, washer, and o-ring needed for a full engine rebuild. The kit features advanced MLS (Multi-Layer Steel) head gaskets and steel Viton-coated base gaskets, designed to handle the increased demands of high-compression, big-bore M8 applications.
Engineered for High Performance
- MLS head gaskets for superior sealing in high-compression M8 engines
- Steel Viton-coated base gaskets offer excellent resistance to harsh engine environments
- Blue Viton valve stem seals for reliable oil control and heat resistance
- AFM material components ensure a precise and durable seal throughout the engine build
Reliable Sealing for Big Bore M8s
Whether you're rebuilding a CVO engine or upgrading to a larger bore on your Milwaukee-Eight, this Cometic EST gasket kit provides the trusted quality and precise fitment you need. It’s designed as a direct replacement, ensuring compatibility and long-lasting performance. Always confirm your engine's bore size before ordering to ensure the correct fitment for your specific Harley-Davidson or Indian Motorcycle M8 model.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10220-030
- Engine Application: Milwaukee 8 EST
- Bore Size: 4.125"
- Head Gasket Thickness: 0.030"
- Length: 9.5 in
- Width: 9.7 in
- Height: 1.2 in
- Weight: 0.8 lbs
Common questions
Which Milwaukee-Eight engines is this gasket kit compatible with?
This Cometic EST gasket kit is specifically designed for Milwaukee-Eight (M8) engines with a 4.125-inch bore, typically found in 117 cubic inch CVO models. It will not fit smaller bore M8s or other engine platforms.
What does this complete overhaul kit include?
The kit provides all gaskets, seals, washers, and o-rings necessary for a full engine rebuild, including MLS head gaskets, steel Viton-coated base gaskets, blue Viton valve stem seals, and various AFM material components.
Is this kit suitable for high-performance builds?
Yes, the MLS head gaskets and Viton-coated components are engineered to provide superior sealing and durability, making this kit an excellent choice for high-compression and performance-oriented Milwaukee-Eight engine builds.
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 | 68-10220-030 |
| WEIGHT | 0.8 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
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✓ VERIFIED
Oct 18, 2021
Great seals and gaskets do the job once when you use quality gaskets
✓ VERIFIED
Sep 26, 2019
Seal good and I haven't had any issues..
✓ VERIFIED
Jun 27, 2025
It worked like it was suppose to, delivery was quick. <br />Pleased.
✓ VERIFIED
Dec 19, 2023
Just what I needed
Needed these when changing out intake manifold. They worked perfect for my ‘03 sporty.
✓ 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.
