✓ VERIFIED
Jul 11, 2021
The product was good the shipping sucks. No reason it should take so long to get a small light weight package.
COMETIC
SKU: 68-10166
Cometic Milwaukee-Eight MLS Head Gaskets 4.075" Bore .040" Thick - Harley Milwaukee-Eight
$59.50
Free shipping on orders $99+ · Best value guarantee
affirm
From $4.95/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
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 pushing a Milwaukee-Eight engine, reliable sealing is non-negotiable. These Cometic MLS (multi-layer steel) head gaskets are engineered to handle the increased cylinder pressures and temperatures of high-performance V-twin builds. They provide a robust seal that factory gaskets can't match, especially when running higher compression or boost.
Why riders pick this
- MLS (Multi-Layer Steel) construction for superior sealing
- Engineered for high-performance Milwaukee-Eight engines
- Designed for 4.075" gasket bore with .040" thickness
- Resists extreme heat and cylinder pressure
- Direct fit replacement for M8 platforms
These Cometic Milwaukee-Eight head gaskets are built for riders who demand more from their M8. Featuring a 4.075" gasket bore and .040" MLS (multi-layer steel) construction, they're designed for a precise fit and superior sealing performance. Whether you're doing a cam swap, a big bore kit, or adding forced induction, these gaskets provide the reliability needed to keep your build buttoned up.
Engineered for High Performance
- Multi-layer steel construction for enhanced sealing
- Resistant to extreme heat and pressure fluctuations
- Designed for a precise 4.075" gasket bore
- Crucial for high-compression or boosted M8 engines
The Foundation of a Strong Build
Don't overlook the critical role of quality gaskets in any engine upgrade. These Cometic head gaskets are a vital component for ensuring the longevity and performance of your Milwaukee-Eight. They are a direct replacement, but their advanced construction makes them ideal for engines that are uncorked and pushed harder than stock. Pair them with a meticulous assembly process for peace of mind on the road.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10166
- Gasket Bore: 4.075"
- Finished Bore: 4.095"
- Thickness: 0.040" MLS
- Length: 8 in
- Width: 8.5 in
- Height: 0.25 in
- Weight: 0.4 lbs
Common questions
Will these head gaskets fit my Twin Cam engine?
No, these Cometic head gaskets are specifically engineered for Milwaukee-Eight engines only. Twin Cam owners will need a different gasket set.
What does MLS construction mean for my engine?
MLS stands for multi-layer steel, which means the gasket is constructed from several layers of steel. This design provides superior sealing under high heat, pressure, and boost, making them ideal for performance M8 builds.
Do I need to replace my head bolts or studs when installing these?
While reusing factory head fasteners is common, it's always best practice to inspect them for any signs of wear or stretching. Consult your factory service manual for specific recommendations for your year and model Milwaukee-Eight.
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 | 68-10166 |
| WEIGHT | 0.4 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
5
19 RATINGS
5★
19
4★
0
3★
0
2★
0
1★
0
✓ VERIFIED
Dec 22, 2024
US made seals.
Quality product.<br /><br />Bla, bla, bla, bla, bla, bla, bla, bla, bla, bla
✓ VERIFIED
Aug 29, 2023
Intake manifold leaks
Great seals worked good on my 1992 Harley Davidson Flhtcu nice a tight no more leaks !! <br />Highly recommended !!
✓ VERIFIED
May 15, 2023
Time for new seals
Got change these out every now and then. Got a rebuild kit for the Mukuni. Might as well change the intake manifold seal while I am doing the rebuild.
✓ VERIFIED
Dec 10, 2022
Great product great quality at a great price you can't beat that.
✓ VERIFIED
Nov 22, 2022
Excellent job
