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Engines and Components› Pistons and Piston Rings

SEALED POWER

Moly Piston Ring Set

$266.99 $183.59 Save $83.40

SKU: S03T E-377K

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Sealed Power E377K Moly Piston Ring Set is designed for Small Block Chevrolet (SB-Chevy) 8-cylinder engines with a 4.0000 inch bore diameter. These rings feature plasma-moly coated top rings to decrease friction and resist scuffing, and are manufactured to meet or exceed OEM specifications.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSEALED POWER
Part NumberS03T E-377K

Videos

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Rebuilding a 283 Small Block for a Daily Driver C10 - HorsePower S12, E7
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V-8 Engine Rebuild SBC #4 Part 2 Rod Bearing Install

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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