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Engines and Components› Pistons and Piston Rings

SEALED POWER

Piston Ring Set 4.250 5/64 5/64 3/16

$512.99 $339.25 Save $173.74

SKU: S03T R-9905

In Stock
In Stock
Ships by Jun 8
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Sealed Power R-9905 Engine Piston Ring Set features a torsional barrel face for the top ring, made of ductile iron plasma moly, and a reverse torsional second ring made of cast iron. It uses a SS50U oil ring design with standard tension. This set is recommended for street, marine, and racing applications where file fitting isn't necessary. Plasma-moly coating on the top ring face decreases friction and resists scuffing, and increased porosity improves top ring lubrication.

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 R-9905

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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