Engines and Components› Camshafts and Valvetrain

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.850in Head Dia. 5.500in O/A Length, 0.3415in Stem

$766.42

SKU: M004 12339-8

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

Moderate — 2–4 hours

Description

Manley Performance Severe Duty BBC series performance valves are made from stainless steel with chrome stems and hardened valve tips, swirl polished, and fully machined. These valves are specifically produced for the Brodix 383 Head Hunter™ cylinder heads, BB-4/SAR, SR20, and Edelbrock Victor #12363425 Heads.

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

BrandManley Performance
Part NumberM004 12339-8

Videos

FAST and EASY! Installing Exhaust Valve Guides On A Flathead Ed Smith #classiccars

FAST and EASY! Installing Exhaust Valve Guides On A Flathead Ed Smith #classiccars
#shorts This Is One Way To Replace Bronze Valve Guides In Aluminum Race Heads!

#shorts This Is One Way To Replace Bronze Valve Guides In Aluminum Race Heads!

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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