Exhaust› Headers, Manifolds and Components
Mr. Gasket
Ultra-Seal Header Gaskets Fits 1955-1991 Chevrolet 262-400 Gen I Small Block Square Ports, 1.45 Inch x 1.55 Inch Mr Gasket
SKU: M00S 5901
Easy — 1–2 hours
Description
This construction allows the gasket to conform to warped flanges and provides better sealing capabilities under high heat and pressure. The expanded steel core ensures stability and maximum torque retention, while the graphite facing offers excellent heat resistance.
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 | Mr. Gasket |
| Part Number | M00S 5901 |
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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