Engines and Components› Camshafts and Valvetrain
Manley Performance
Manley SPRING-1.311 SINGLE EA
SKU: M004 221438-1
Moderate — 2–4 hours
Description
These springs feature a proprietary heat-treating process and computer-aided modeling to minimize valve bounce and valve gear separation. Their design includes an extended tip thickness to prevent overload breakage and tightly controlled open-end flatness to reduce valve stem side loading.
Fitment
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Specifications
| Brand | Manley Performance |
| Part Number | M004 221438-1 |
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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