Chevrolet Performance LS3 Aluminum CNC Ported Cylinder Head (ASSEMBLED)

GM Performance Parts
$765.19
Current Stock:
SKU:
88958758
Availability:
In Stock & Ready to Ship

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!

 

Features

  • 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

     

     

    LS3 CNC Ported Head Flow Chart
    Valve Lift (Inches) Intake Flow (CFM) Exhaust Flow (CFM)
    .100 74 89
    .200 178 137
    .300 237 176
    .400 302 228
    .500 333 244
    .550 348 249
    .600 355 253
    .700 363 258