Engines and Components› Camshafts and Valvetrain
Supertech
Single Valve Spring Kit
SKU: SPR-H1003S-J32
Advanced — 4+ hours
Description
It features specific spring specifications including a seat pressure of 71 lbs at 39.90mm, a maximum lift of 12.30mm, and a coil bind of 27.60mm. The spring rate is 9.90 lbs/mm, and it uses the RET-H1003/T1 retainer.
Fitment
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Available on iOS & Android
Specifications
| Brand | Supertech |
| Part Number | SPR-H1003S-J32 |
| Category | Engines and Components |
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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