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KB Performance Auto Pistons

United Engine & Machine's KB Performance brand pistons trace their lineage to the techniques and knowledge of legendary engine builder Keith Black, who built some of the most famous race engines of the 70s and 80s. The KB Performance line of pistons takes all that Keith knew and applies modern manufacturing techniques and standards. They come ready for your racing or high performance application straight out of the box.

Created from a high-silicon aluminum alloy, KB Performance pistons are lightweight to improve throttle response and RPM changes while still being strong enough to withstand high compression and high temperatures. Each piston is engineered with race ready features like high upper compression-ring locations, gas-accumulator grooves, drilled oil returns, and spiral-lock retainer grooves.

KB Performance pistons are available for many popular engine makes and displacements. They also  come in a variety of compression ratios to suit your performance needs. Have a look through our catalog and find the piston that meets your needs and wants today!

  • 390 Hypereutectic alloy
  • Fully machined crowns and valve reliefs
  • Drilled oil drain backs
  • Full floating wrist pins
  • Triple wound spiral locks
  • Over 190 different oversize part numbers
  • Reflective alloy allows 2% power increase
  • Applications available with 5/64th and 1/16th ring packs.
  • Vast assortment of compression ratios available in dish flat top and dome styles
  • Quench dome technology minimizes deterioration
  • Zero deck quench designs
  • Lightweight wrist pins available in most applications
  • All part numbers available in kits with rings

 

Please select from our KB Performance lines below to peruse our catalog.