Engines and Components› Camshafts and Valvetrain

Manley Performance

Manley Chevrolet Big Block 2.300 Head Dia .5.494in Stem Severe Duty Intake Valve Kit - Set of 8

$651.45

SKU: M004 12854-8

In Stock
In Stock
Ships by Jun 20
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The Manley Performance Severe Duty Intake Valve Kit (12854-8) is designed for high-temperature gasoline engines, featuring chrome stems and hard tips for durability. It incorporates swirl polished underhead areas and fully machined combustion faces for optimized airflow and combustion efficiency. Manley's NK-844 intake valve material offers superior ultimate tensile strength.

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.

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Specifications

BrandManley Performance
Part NumberM004 12854-8

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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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