Engines and Components› Pistons and Piston Rings

SEALED POWER

6-303 OVERHAUL KIT

$1,665.89

SKU: S03T FP303LOHK

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

Professional / shop required

Description

Sealed Power engine components are designed to restore power, precision, and durability. They match OE specifications for form, fit, and function, ensuring a clean install and OE-style performance. This kit includes pistons with proprietary materials, controlled machining, premium alloys, and engineered strength. The piston ring sets are built for power, precision, horsepower, oil control, and durability from tough materials for longer service life. Engine bearings are precision-designed to exacting tolerances, ensuring durability and performance under extreme heat and loads.

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 FP303LOHK

Videos

John Deere 4440 in-frame engine rebuild.

John Deere 4440 in-frame engine rebuild.
John Deere engine rebuild | Installing liners | Rebuild kit

John Deere engine rebuild | Installing liners | Rebuild kit
John Deere 350B bulldozer engine rebuild

John Deere 350B bulldozer engine rebuild
Part 2 John Deere 4045 engine rebuild after it was ran with gravel inside it #rockcrusher

Part 2 John Deere 4045 engine rebuild after it was ran with gravel inside it #rockcrusher
John Deere 850j dozer 6090 9.0 full engine rebuild after it was ran without oil part 4

John Deere 850j dozer 6090 9.0 full engine rebuild after it was ran without oil part 4
John Deere USA 6081 piston installation

John Deere USA 6081 piston installation
The best thing for an engine is a well sealed cylinder

The best thing for an engine is a well sealed cylinder
How to Choose an Engine Rebuild Kit - Summit Racing Quick Flicks

How to Choose an Engine Rebuild Kit - Summit Racing Quick Flicks

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.

View Full Return Policy