Exterior Components› Body Panels and Components
Manley Performance
Manley SPRING-1448 POLISHED EA
SKU: M004 221448P-1
Easy — 1–2 hours
Description
This valve spring features a proprietary, multi-step heat-treating process to minimize load loss and computer-aided modeling to reduce valve bounce and valve gear separation. Its smaller diameter and lightweight construction allow engines to rev higher faster. The springs have an extended tip thickness to eliminate 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 221448P-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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