Engines and Components› Pistons and Piston Rings
United Engine & Machine Co
1 SET KB129.STD/1 SET 4125BD8.005
SKU: U00B KB129KTD.STD
Advanced — 4+ hours
Description
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 KB129KTD.STD |
Videos
Engine Failure!? Watch if you are running Hypereutectic pistons!
SBC Piston Ring and Rod Orientation (For the First time Builders)
Sbc 400 bored .040, KB flat top pistons, LT1 off set rods, 508 Camshaft, 487 Heads, 750 carb
Fool proof installing pistons on rods of a Small Block Chevy
The Truth About The Small Block Chevy 400
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