Engines and Components› Cylinder Heads and Components
Dorman
41.5MM CUP EXPANSION PLUG
SKU: D00I 555-087
Easy — 1–2 hours
Description
This expansion plug serves as a direct replacement for missing or failed factory parts, ensuring it fits the specified years, makes, and models. It is constructed from durable steel for long service life.
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 | Dorman |
| Part Number | D00I 555-087 |
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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