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Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head

Chevrolet Performance
Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head

The Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head design benefits from General Motors' extensive research and development program, ensuring maximum airflow without compromises. In fact, many professional builders use this head as straight bolt-ons, with no further machining. These assembled heads use premium machining and materials, including CNC finishing and porting, along with lightweight, hollow-stem intake valves and sodium-filled exhaust valves to provide your engine with the power increase you have been searching for!

  • Manufactured from 319-T5 aluminum alloy
  • 2.165" Hollow Stem Intake Valves
  • 1.590" Solid Stem Exhaust Valves
  • 15 degree valve angle
  • 276cc CNC'd intake ports
  • 92cc CNC'd D-shaped exhaust ports
  • 68.5cc combustion chambers (maintains stock LS3 compression ratio!)
  • .550" max valve lift with installed springs
  • Symmetrical intake and exhaust ports
  • High-efficiency combustion chambers
  • 14mm, 5/8" hex, 3/4" reach, taper-seat Angled spark plug
  • Bolt-down-type rocker arms
  • Center-bolt valve cover hold-downs
  • Design for any LS engine with cylinder bores of 4.000 inches or larger, including 6.2L L92 truck engines
  • All fasteners are metric
  • 10% increase in airflow over factory LS3 head

    JEGS Easy Kits are designed by JEGS Professionals to help you get all the performance parts you need.

    LS3 CNC Ported Head Flow Chart
    Valve Lift (Inches) Intake Flow (CFM) Exhaust Flow (CFM)

  • 2 Products

    LS3 Aluminum Cylinder Head

    LS-Series LS3 Racing Cylinder Head
  • CNC-Ported and Assembled
  • Sold individually, 1/pkg
  • FREE
    Order Today Ships 11/27/15

    LS-Series LS3 Racing Cylinder Head Kit
  • CNC-Ported and Assembled
  • LS3 CNC-Ported Heads
  • Head Gaskets
  • Head Bolts
  • Valve Cover Gaskets
  • Intake Gaskets
  • Exhaust Gaskets
  • FREE
    Easy Kits
    Order Today Ships 11/27/15

    2 Products