✓ VERIFIED
Jan 26, 2023
Quick delivery right gasket s
JAMES GASKETS
SKU: 681-4620
James Gaskets Big Twin Primary Housing Gasket - Quad Seal Derby Softail Dyna 10… — Harley-Davidson (1984-1999)
$38.95
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James Gaskets big twin primary housing gasket for Harley-Davidson and Indian Motorcycle V-twins, engineered to seal the primary cover against oil leakage. Made in the U.S.A. using state-of-the-art materials and production methods.
Features
- Made in the U.S.A.
- Quad seal derby design
- OEM-grade gasket material
Specifications
- Brand: James Gaskets
- Manufacturer Part #: 25416-84-X
- Length: 6.85 in
- Width: 10.05 in
- Height: 0.65 in
- Weight: 0.155 lbs
Fitment
Fits V-twin Harley-Davidson and Indian Motorcycle big twin engines with primary housings designed for quad seal derby covers.
Frequently Asked Questions
What's the difference between this gasket and a standard primary gasket?
The quad seal design provides superior oil retention compared to standard single-seal gaskets, reducing weeping and leaks.
Is this a direct OEM replacement?
Yes — James Gaskets manufactures this gasket to OEM specifications as a direct replacement for factory primary housing seals.
Will this fit my Softail or Dyna?
This gasket fits big twin V-twins with quad seal derby primary covers, which are common on Softail and Dyna models. Verify your primary cover style before ordering.
Do I need any special tools to install this?
Standard gasket scraper and hex wrenches are sufficient. Remove the primary cover, clean the mounting surface, and bolt the new gasket in place.
| BRAND | James Gaskets |
| TYPE | Gaskets/Seals |
| SKU | 681-4620 |
| WEIGHT | 0.15 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.79
24 RATINGS
5★
20
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3
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✓ VERIFIED
Oct 14, 2021
Great product! Fast delivery!
✓ VERIFIED
Sep 10, 2021
Great design! No O ring to forget and good seal on base.
✓ VERIFIED
Feb 4, 2021
Great! No leaks.
✓ VERIFIED
Jun 9, 2020
I didn't think the base gaskets would be paper. Everything else was great
✓ VERIFIED
May 12, 2020
purfect
