Engines and Components› Camshafts and Valvetrain

Manley Performance

Manley CAPS-.3110 STEM ST

$220.40

SKU: M004 42300-8

In Stock
In Stock
Ships by Jun 14
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Manley Performance 42300-8 is a valve lash cap designed for high-performance and racing engines. This steel cap features a 0.080-inch thickness and is intended for use with 5/16-inch valve stems, requiring a minimum tip size of 0.250 inches. It is a non-rotating design and comes in a natural finish as a set of 8.

Manley Performance has been a leader in high-performance automotive parts since 1966, known for quality and innovation in areas like sport compact, Ford modular, and Chevy LS engines.

Fitment

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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 42300-8

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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