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![KB257(8)040 Hypereutectic Piston for Chevrolet, 454 ci [+0.040 in. Oversize]](https://www.jegs.com/images/mini_750/400/416/416-kb257(8)040.jpg)
Vehicle Info NeededENGINETECHPART NUMBER: 416-KB257(8)040
KB257(8)040 Hypereutectic Piston for Chevrolet, 454 ci [+0.040 in. Oversize]
$66799
Ships on 09/17/2026
Lowest Price GuaranteeGM
PistonChevrolet, 454 ci Dome Top Piston; Hypereutectic Alloy Size: +0.040 in. Oversize Set of 8
The Enginetech KB257(8)040 is a replacement piston for Chevrolet, 454 ci engines, sized at +0.040 in. Oversize. Hypereutectic alloy construction provides improved heat resistance and reduced expansion at operating temperature.
Enginetech KB257(8)040 Piston Features:
- Fitment: Chevrolet, 454 ci
- Size: +0.040 in. Oversize
- Hypereutectic alloy piston construction
- Engineered to OE specifications for direct replacement
Part TypePiston
BrandENGINETECH
Package Height4.5
Package Width9.25
Package Length18.25
Weight15.0 PG
Part CategoryReplacement Parts
Piston Pin Outside Diameter0.9900
Second Compression Ring Thickness5/64
Size+0.040 in. Oversize
Top Compression Ring Thickness5/64
QuantitySet of 8
Piston MaterialHypereutectic
Oil Ring Thickness3/16
FitmentChevrolet
Part FitmentDirect Fit
RemanufacturedNo
Bore Diameter4.250
Piston StyleDome
Vendor Part NumberKB257(8)040
Package Qty1
Package TypeEA
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