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Keith Black/KB Pistons

Keith Black/KB Pistons UEM-3910BD8-030 Keith Black Kb Performance 3.940" Piston Ring Set

Keith Black/KB Pistons UEM-3910BD8-030 Keith Black Kb Performance 3.940" Piston Ring Set

UEM-3910BD8-030
$458.50 AUD
$458.50 AUD
Sale Sold out
Tax included. Shipping calculated at checkout.

Keith Black OE-quality piston rings are made from ductile iron, and compression rings are available with moly, chrome, and plasma-moly facings for extra durability.

They will seal mild to high-compression engines, help protect against oil blowby, and feature standard ring end gaps for an easy installation.



  • Bore (in): 3.940 in.
  • Bore (mm): 100.076mm
  • File Fit: No
  • Gapless: No
  • Top Ring Included: Yes
  • Top Ring Thickness: 1/16 in.
  • Top Ring Material: Ductile iron
  • Top Ring Facing Material: Plasma-moly
  • Second Ring Included: Yes
  • Second Ring Thickness: 1/16 in.
  • Second Ring Material: Iron
  • Second Ring Facing Material: Cast iron
  • Oil Ring Included: Yes
  • Oil Ring Thickness: 3/16 in.
  • Oil Ring Tension: Standard
  • Oil Ring Material: Stainless steel
  • Quantity: Sold as a set.

Manufacturer Part Number:

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