Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB111.040/1 SET 4000BD8.045

$645.36

SKU: U00B KB111KTD.040

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

Professional / shop required

Description

The United Engine & Machine Co. KB Hyper Performance Piston Kit (MPN: KB111KTD.040) is a performance-grade piston kit for Chevrolet Small Block V8 Gen I 383 cubic inch stroker engines. Made from 390 Hypereutectic Alloy, these .040-inch oversized pistons feature a centered pin design and are optimized for high compression ratios. The kit includes pistons and rings, providing the essential components for a powerful engine build.

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 KB111KTD.040

Videos

383 SBC Stroker 450HP Engine Package

383 SBC Stroker 450HP Engine Package
Top 5 Best 383 Stroker Crate Engine [Review] | 383 All Iron Stroker/383 Dressed Model [2026]

Top 5 Best 383 Stroker Crate Engine [Review] | 383 All Iron Stroker/383 Dressed Model [2026]
The 383 STROKER Kit Has Arrived... Does It Fit?!

The 383 STROKER Kit Has Arrived... Does It Fit?!
ATK HIGH PERFORMANCE 383 STROKER (HP101C)

ATK HIGH PERFORMANCE 383 STROKER (HP101C)
Chevrolet Performance SP383 Crate Engine

Chevrolet Performance SP383 Crate Engine
ATK High Performance HP55C Chevy 383CI Stroker 500HP

ATK High Performance HP55C Chevy 383CI Stroker 500HP
The Shocking Truth About the 383 Stroker – Built by Gearheads, Not by GM!

The Shocking Truth About the 383 Stroker – Built by Gearheads, Not by GM!
Affordable 383 Stroker build! Parts list *Check description for part #'s*

Affordable 383 Stroker build! Parts list *Check description for part #'s*
Building a 480hp Classic 383" Small Block Chevy - Smeding Performance

Building a 480hp Classic 383" Small Block Chevy - Smeding Performance

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