Exterior Components› Body Panels and Components

United Engine & Machine Co

FORD 2.3L ROD 5.700 FLAT TOP 2V KB HYPER PISTON SET (4PK)

$72.67

SKU: U00B KB217.040

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The United Engine & Machine Co KB217.040 is a set of hypereutectic pistons designed for high-performance applications. These pistons feature a flat top with two valve reliefs and are constructed from a low-expansion 390 alloy with 16% silicon for tighter running clearance.

The pistons are designed for a 3.820" bore and include features like fully machined head and valve reliefs, CNC-machined pin bores, and diamond-finished skirts. They are compatible with a 3.126" crankshaft stroke and a 5.205" rod length.

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

BrandUnited Engine & Machine Co
Part NumberU00B KB217.040

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