LS Series Wiseco “Junkyard Dog” 5.3L Forged Piston Set 3.78″ Bore 3.622″ Stroke 6.098″ Rod Length .945″ Wrist Pins +6cc Flat Top


Model Number: K0041XS

As the leader in LS-1 forged pistons, Wiseco pulled out all the stops when designing this series. Designed to accommodate the reluctor ring on stroker cranks without having to notch the pin bosses. Offset pins like O.E. and skirt shapes specifically designed for street applications make these the best pistons available.

All Pistons Feature:

  • NEW ArmorGlide Coated skirts for LS Series Pistons. Much higher adherence factor then other moly coatings.
  • Strutted skirt design is the strongest and specially designed to run at as little as .004” clearance with excellent skirt wear and minimal noise or rock.
  • Radiused valve pockets for detonation resistance and increased flow around valves.
  • Anti-detonation grooves with the added benefit of keeping the top ring groove free of carbon.
  • 1.2mm Nitride Steel Top, 1.2mm Napier 2nd, and Nitride 3mm
    oil GFX ring packs included for the best seal, reduced friction, and superior oil control.

  • Pressure groove for enhanced ring seal.
  • Features chrome moly pins and Spirolox®. (Tool steel pins optional.)
  • Race Ready Domes don’t require deburring by the engine builder.
  • Wiseco ArmorGlideTM skirt coated for lower friction, reduced noise, and superior life.
  • Multi-fit valve pockets for interchangeability of cylinder heads.


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