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Keith Black KB120.040 Flat Top 5.7 Rod SBC 350 Hypereutectic Pist
Keith Black KB120.040 Flat Top 5.7 Rod SBC 350 Hypereutectic Pist

Keith Black KB120.040 Flat Top 5.7 Rod SBC 350 Hypereutectic Pist

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Keith Black KB120.040 Flat Top 5.7 Rod SBC 350 Hypereutectic Pist
Keith Black KB120.040 Flat Top 5.7 Rod SBC 350 Hypereutectic Pist
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Part # UP108115
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.

Details

Piston Material:
Hypereutectic Aluminum
Piston Style:
Flat Top w/ 2 valve reliefs
Piston Diameter:
4.040"
Connecting Rod Length:
5.700"
Piston Ring Style:
A
Stroke:
3.48"
Wrist Pin Diameter:
.9272"
Piston Weight:
535 grams
Wrist Pin Weight:
145 grams
Compression 58cc =:
10.9 : 1
Compression 64cc =:
10.2 : 1
Compression 76cc =:
8.9 : 1
Sold in Quantity:
Set
MFG. Part #:
KB120.040
GTIN Code:
800745043719

Info

These are garage sale priced because one piston is damaged.

No Warranty, No Returns on Garage Sale Items    

 

 

Keith Black Hypereutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by.

For S/B Chevy 350 c.i. (4.000" bore x 3.48" stroke).

  • 390 Hypereutectic alloy
  • Fully machined crowns and valve reliefs
  • Drilled oil drain backs
  • Full floating wrist pins
  • Triple wound spiral locks
  • Reflective alloy allows 2% power increase
  • Quench dome technology minimizes deterioration
  • Zero deck quench designs
  • Lightweight wrist pins

Ring Style Chart (GIF)

 

474-120 Instructions (PDF)

Some parts are not legal for use in California or other states with similar laws/regulations

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Videos & Articles
  • Piston Ring Style Chart
  • In this Tech Tip, John discusses LT1 rotating assembly options for a customer looking to build a solid autoX, drag, and occasional strip powerplant for his Firebird.
  • Tim M. has tried to stay true to the vintage route, but sometimes, exceptions must be made. For example, the original oiling system's paper element and canister are functional, but an upgraded system will be more reliable.

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