✓ VERIFIED
Apr 17, 2025
Gasket quality
Great gasket kit over delivered in the quality of the gasket set great job
COMETIC
SKU: 68-10179
Cometic Milwaukee 8 Rocker Box Assembly Gasket - M8 .020" RC 10pk Oe#25700372 — Harley-Davidson (2017-2019)
$113.10
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Cometic Milwaukee 8 rocker box assembly gasket for Harley-Davidson M8 engines, sold in a 10-pack. OEM-replacement gasket engineered to seal the rocker box at 0.020" thickness per Harley specification.
Features
- 10-pack quantity
- 0.020" thickness — OEM spec
- Milwaukee-Eight (M8) rocker box gasket
- Direct replacement for OEM #25700372
Specifications
- Brand: Cometic
- Manufacturer Part #: C10179
- OEM Part #: 25700372
- Thickness: 0.020"
- Quantity: 10 per pack
- Length: 8 in
- Width: 8.5 in
- Weight: 0.5 lbs
Fitment
Fits Harley-Davidson Milwaukee-Eight (M8) engines requiring rocker box assembly gaskets.
Frequently Asked Questions
Is this the correct gasket for my M8 Harley?
Yes — this Cometic gasket matches OEM #25700372 and is sized at 0.020" thickness per Harley specification for Milwaukee-Eight engines.
Why is this sold in a 10-pack?
Pack quantity is designed for shops, multi-bike rebuilds, or riders stocking spares for rocker box service.
Will this fit Twin Cam engines?
No — this gasket is specific to Milwaukee-Eight (M8) engines. Twin Cam rocker boxes require a different gasket part number.
Do I need any other gaskets for a rocker box rebuild?
Check your complete rocker box gasket kit — you may need additional seals depending on whether you're doing a full rebuild or just replacing the rocker box assembly gasket.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-10179 |
| WEIGHT | 0.5 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.67
18 RATINGS
5★
16
4★
0
3★
1
2★
0
1★
1
✓ VERIFIED
Jun 3, 2023
DONT FOLLOW PRINTED INSTRUCTIONS!
DON’T FOLLOW THE INSTRUCTIONS ON THE BOX!!! It says recommended torque is 42 lb/ft. You know what happened at 32lb/ft? One of bolts broke! And I was lucky there was long enough piece sticking out to remove it without drilling out! Check photos.
✓ VERIFIED
Feb 21, 2022
Fits well!
✓ VERIFIED
Sep 10, 2021
Quality part great service and got it ahead of time great place
✓ VERIFIED
Jun 7, 2021
No leaks!!<br />Ordering was a breeze. Shipping was fast and I live way out in the middle of the Pacific Ocean, Hawaii. Price was much better than competition.
✓ VERIFIED
Nov 1, 2020
Great gaskets. Bike has been running great ever since I installed these last week, about 270 miles on em, no issues
