Mr. Gasket
Header Stud Kit Fits AMC 290-401, Chevrolet 262-400 Small Block, Chrysler 383-440 B/RB Big Block except 426 Hemi, Pontiac 326-455 & Oldsmobile 330-455 Mr Gasket
SKU: M00S 6312
Description
Part #: 6312
Black Oxide Coated Studs and Cadmium Plated Nuts(12) Pieces 3/8 Inch-16 x 1.5 Inch Studs and NutsDetails:Emission Code: 5Finish: Black OxideMaterial: SteelWarranty: Manufacturer's Limited 90 Day Warranty
Features:
- (12) Pieces 3/8"-16 x 1.5" Studs & Nuts
Header Stud - 3/8 in Diameter - 1.500 in Long - Hex Nuts - Steel - Black Oxide / Cadmium - AMC V8 / GM V8 / Mopar B / RB-Series - Set of 12
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 6312 |
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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