Cometic Milwaukee-Eight 128ci 0.040" Top End Gasket Kit - Harley Milwaukee-Eight
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 you're tearing into a Milwaukee-Eight top end, don't skimp on the seals. This Cometic top end gasket kit is engineered for 128 cubic inch M8 engines, providing a reliable and complete set of gaskets for your rebuild.
Why riders pick this
- Full top end gasket set for Milwaukee-Eight engines
- Features a 0.040" thick head gasket
- Designed for 128 cubic inch (4.320" bore) M8 builds
- Ensures reliable, leak-free sealing performance
- OEM-equivalent quality for precise fitment
This Cometic Milwaukee-Eight top end gasket kit is purpose-built for high-performance 128 cubic inch M8 engines. It provides all the necessary gaskets and seals for a complete top end overhaul, ensuring a leak-free and robust assembly after cam swaps, head work, or big bore upgrades. Each component is manufactured to precise standards, giving you peace of mind when pushing your V-twin hard.
Precision Sealing for Performance Builds
- Complete top end gasket set for a comprehensive rebuild
- Includes a 0.040" thick head gasket for optimal compression
- Specifically designed for 128 cubic inch (4.320" bore) Milwaukee-Eight engines
- Engineered to OEM-equivalent specifications for reliable fitment
Rebuild with Confidence
Whether you're refreshing a high-mileage M8 or putting together a fresh performance build, this Cometic kit takes the guesswork out of gasket selection. The specific 0.040" head gasket thickness is crucial for maintaining your desired compression ratio, and the full set of seals means you're not scrambling for individual components mid-build. Pair this with a fresh set of cylinder heads and a performance cam for a complete top-end transformation.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10224
- Length: 9 in
- Width: 7 in
- Height: 1.25 in
- Weight: 0.95 lbs
Common questions
What engines does this gasket kit fit?
This kit is designed specifically for Milwaukee-Eight (M8) engines with a 4.320" bore, typically found in 128 cubic inch builds. It will not fit Twin Cam or Evolution engines.
Is the head gasket thickness important?
Yes, the 0.040" head gasket thickness is a critical factor in your engine's compression ratio. Ensure this thickness is appropriate for your specific engine build requirements.
Does this kit include all gaskets for a top end rebuild?
Yes, this is a complete top end gasket set, including the head gasket, intake and exhaust manifold seals, and other upper-engine seals necessary for a comprehensive M8 top end rebuild.
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 | 68-10224 |
| WEIGHT | 0.95 lb |
