Mr. Gasket
Push-On Breather Flat Black Fits 1.22 Inch Diameter Valve Cover Holes. Replaces GM Breather 6421868 On Late 65-67 GM Big Block Mr Gasket
SKU: M00S 9810BP
Description
Part #: 9810BP
This chrome plated breather, or oil filler cap, is internally baffled with filter. Very similar to the original equipment breather used on 1965-1967 Chevrolet 396-427 Big Blocks. GM (General Motors) #6421868. Fits valve cover openings with 1.22 inch diameter. Its overall dimensions are 2-1/8 inch tall and 2-1/2 inch in diameter.
Fits 1.22 Inch Diameter Valve Cover Holes. Replaces GM Breather 6421868 On Late 65-67 GM Big Block.
Fitment
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Specifications
| Brand | Mr. Gasket |
| Part Number | M00S 9810BP |
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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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