Beginner — under 30 min
Description
The pistons have a stock stroke of 3.850 inches and a rod length of 6.605 inches. They include press-fit wrist pins with a diameter of 1.040 inches and are sold in a set of 8. The piston rings have a thickness of 5/64 in. x 5/64 in. x 3/16 in.
Fitment
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Specifications
| Brand | SEALED POWER |
| Part Number | S03T H418CP 40 |
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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