Beginner — under 30 min
Description
With an ultra-thin wall thickness of just 0.01 inches (0.25mm), the 99212 allows the use of the original seal size while adding minimal lip loading. It features a removable flange and includes an installation tool for easy application. The specialized installation tool helps reduce sleeve distortion and facilitates installation without needing to remove the shaft.
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | NATIONAL |
| Part Number | N038 99212 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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