✓ 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: 68-10305
Cometic ALL M8 OIL PUMP SEAL PUMP TO ENGINE CASE VITON 1PK - ENG Seal Viton 1pk… — Harley-Davidson (2018-2021)
$8.03
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Cometic M8 oil pump seal in Viton material, designed to seal the oil pump mounting surface where it connects to the engine case on Milwaukee-Eight engines. Single pack for one seal replacement.
Features
- Viton material for heat and oil resistance
- Direct M8 pump-to-case fit
- Single seal per pack
Specifications
- Brand: Cometic
- Manufacturer Part #: C10305
- Material: Viton
- Length: 9 in
- Width: 7 in
- Height: 2 in
- Weight: 1 lbs
Fitment
Fits Harley-Davidson Milwaukee-Eight (M8) engines at the oil pump-to-case mounting surface.
Frequently Asked Questions
Will this fit Twin Cam engines?
No — this seal is specific to Milwaukee-Eight (M8) engines. Twin Cam owners need a different part number.
What material is this seal made from?
Viton, which resists heat and oil degradation for long-term reliability at the pump-to-case interface.
Do I need any special tools to install this?
Installation requires removal of the oil pump from the engine case. A service manual and basic socket set are recommended.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-10305 |
| WEIGHT | 1.0 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★
0
1★
0
✓ 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.
