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Chevrolet Performance 88958758 - Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head



Chevrolet Performance 88958758 - Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head
Chevrolet Performance 88958758 - Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head

JEGS Part Number: 809-88958758

LS-Series LS3 Racing Cylinder Head
  • CNC-Ported and Assembled
  • Sold individually, 1/pkg

    Chevrolet Performance 88958758 Details

    LS3 Aluminum Cylinder Head

    Assembled Head Components:
  • Intake Valves - P/N 12569427
  • Exhaust Valves - P/N 12582719
  • Valve Springs - P/N 12625033
  • Valve Locks - P/N 10166345
  • Valve Spring Retainers - P/N 10166344
  • Intake Valve Stem Seals - P/N 12482063
  • Exhaust Valve Stem Seals - P/N 12482062

  • 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!

    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

    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)
    .1007489
    .200178137
    .300237176
    .400302228
    .500333244
    .550348249
    .600355253
    .700363258

  • Chevrolet Performance 88958758

    Accessory Bolt Holes Drilled
    Yes
    Calculator
    Compression Calculator
    CNC-Machined Combustion Chamber
    Yes
    CNC-Machined Exhaust Runner
    Yes
    CNC-Machined Intake Runner
    Yes
    Combustion Chamber Style
    Open chamber
    Combustion Chamber Volume (cc)
    68
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    D-port
    Exhaust Runner Volume (cc)
    92
    Exhaust Valve Diameter (in.)
    1.59
    Exhaust Valves Included
    Yes
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Port Shape
    Rectangular
    Intake Runner Volume (cc)
    276
    Intake Valve Diameter (in.)
    2.165
    Intake Valves Included
    Yes
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.55
    Oiling Style
    Through pushrod
    Quantity
    Sold individually
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Steam Holes Drilled
    No
    Valve Guides Included
    Yes
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    88958758
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