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Keith Black/KB Pistons KB253-STD - Keith Black KB Performance Pistons

  • Pistons, Hypereutectic, Flat, 4.000 in. Bore, 1/16 in., 1/16 in., 3/16 in. Ring, Chevy, Small Block, Set of 8
  • Application Specific
  • Estimated Ship Date: 2/20/2012
 
BrandKeith Black/KB Pistons
Manufacturer's Part NumberKB253-STD
Part TypePistons
Product LineKeith Black KB Performance Pistons
Summit Racing Part NumberUEM-KB253-STD
UPC800745059819
 
Bore (in)4.000 in.
Bore (mm)101.600mm
Piston StyleFlat top, with two valve reliefs
Piston MaterialHypereutectic aluminum
Compression Distance (in)1.433 in.
Piston Head Volume (cc)+7.00cc
Wrist Pin StylePress-fit or floating
Pin Diameter (in)0.927 in.
Piston Ring Thickness1/16 in. x 1/16 in. x 3/16 in.
QuantitySold as a set of 8.
NotesPiston weight 475g, pin weight 102g. Centered pin, 2.500 inch length.
CalculatorCompression Calculator
ToolStroker Combinations
 

Keith Black hypereutectic pistons are made from 390 alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated hypereutectics. Their 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves make these pistons outstanding for performance applications. On top of that, Keith Black's hypereutectic pistons have a lightweight, rigid-rib skirt design that stabilizes the piston in the bore. All of this adds up to pistons that fit tighter than forged types, provide improved oil control, reduce blowby, increase ring life, eliminate cold start-up knocking, and won't cost you an arm and a leg!

Warranty

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