✓ 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: 68-10256
Cometic Milwaukee 8 Engine Gasket Kit - M8 4.250" 124cu .040"h/G — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)
$264.54
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Cometic Milwaukee 8 engine gasket kit with 4.250" bore, 124 cubic inch displacement, and 0.040" head gasket thickness. Complete kit includes every gasket, seal, washer, and o-ring required for a full engine overhaul on M8-powered bikes.
Features
- Complete gasket, seal, and o-ring set for full engine rebuild
- 4.250" bore, 124 cubic inch displacement
- 0.040" head gasket thickness
- Manufactured in the United States
- Kit packaging dimensions: 8.75" L x 7.5" W x 2" H
Specifications
- Brand: Cometic
- Manufacturer Part #: C10256
- Bore: 4.250"
- Displacement: 124 cu
- Head Gasket Thickness: 0.040"
- Length: 8.75 in
- Width: 7.5 in
- Height: 2 in
- Weight: 3 lbs
- Country of Origin: United States of America
Fitment
Fits V-twin motorcycles with Milwaukee 8 (M8) engines.
Frequently Asked Questions
What's included in this gasket kit?
Every gasket, seal, washer, and o-ring needed for a complete engine overhaul on M8-powered bikes.
Is this kit suitable for a full rebuild?
Yes — Cometic designs these kits to be a one-stop solution for complete engine gasket replacement during overhaul.
Will this fit Twin Cam or Revolution engines?
No — this kit is specific to Milwaukee 8 (M8) engines. Twin Cam and Revolution engines require different part numbers.
Is this made in the USA?
Yes — manufactured in the United States by Cometic Gasket.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-10256 |
| WEIGHT | 3.0 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
5★
13
4★
2
3★
0
2★
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1★
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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.
