Exterior Components› Body Panels and Components
United Engine & Machine Co
CHEVROLET 377/400 ROD 5.7/5.565 FLAT TOP +7CC 2V KB HYPER PISTON SET
SKU: U00B KB172.STD
Advanced — 4+ hours
Description
MIA's Description
These pistons are recommended for Chevy small block Gen I engines, specifically 6.6L/400 CID engines from 1970-1980. They can also be used on 377 CID engines with specific crankshaft, rod length, stroke, and deck height configurations.
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
| Brand | United Engine & Machine Co |
| Part Number | U00B KB172.STD |
Videos
HOW TO BUILD A SMALL BLOCK CHEVY EPISODE 3: INSTALLING PISTONS AND RODS
BUDGET 350 Chevy DIY How to install Pistons and Rings in your SBC
Fool proof installing pistons on rods of a Small Block Chevy
Engine Failure!? Watch if you are running Hypereutectic pistons!
Engine Building Part 4: Pistons, Rings, and Rods
SBC Rods and Pistons Orientation and Piston Orientation in Block
KB Pistons and Ring End Gap
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