Engines and Components› Camshafts and Valvetrain
Manley Performance
Manley Chevrolet Small Block Exhaust Valve Kit - 1.600in Head Dia. 5.050in O/A Length, 0.3136in Stem
SKU: M004 12303-8
Advanced — 4+ hours
Description
Fitment
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Available on iOS & Android
Specifications
| Brand | Manley Performance |
| Part Number | M004 12303-8 |
Videos
Manley Performance Factory Tour - Pistons, Connecting Rods, Valvetrain Manufacturing | RS Garage
Valve Springs: How to Choose, Set Up & Install Them Right (For Your BUILD!)
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IRL valve controller gives you the best of both worlds for your exhaust! #bmwm #g80m3 #exhaust
Exhaust Talk: 04 | Exhaust Valves Explained, How Do They Work, How Do They Change The Sound?
Valvetronic Designs Vacuum Control Box Install Guide
No Exhaust Valves were harmed in the making of this video
Simple Valve Spring Set Up #diy #tips #tools #mechanic #shorts
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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