Fathers Day
Call Our Support Line
24 Hours / 7 Days a Week!  
Same Day Shipping Before 11 PM ET
My Cart
Shop By Vehicle
Shop By
Close Menu
Top Categories
All Categories

All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates

Chevrolet Performance 12578449

LS-Series LS7 Racing Cylinder Head, CNC-Ported and Assembled

Chevrolet Performance 12578449


jegs shipping
FREE Shipping
Estimated ship date 06/30/17 if Ordered Today
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
Chevrolet Performance 12578449 LS-Series LS7 Racing Cylinder Head, CNC-Ported and Assembled $1,388.54
LS-Series LS7 Racing Cylinder Head
  • CNC-Ported and Assembled
  • Sold Individually, 1/pkg

  • Chevrolet Performance 12578449 Details

    LS7 Aluminum Cylinder Head

    Assembled Head Components:
  • Intake Valves - P/N 12591644
  • Exhaust Valves - P/N 12578455
  • Valve Springs - P/N 12621428
  • Valve Locks - P/N 10166345
  • Valve Spring Retainers - P/N 12596508
  • Intake Valve Stem Seals - P/N 12482063
  • Exhaust Valve Stem Seals - P/N 12482062
  • Intake Valve Lash Caps - P/N 12596509

  • Specifications:

    Manufacturer's Part Number:

    The Chevrolet Performance LS7 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 356-T6 aluminum
  • 2.20" Titanium Intake Valves
  • 1.61" Sodium Filled Exhaust Valves
  • 12 degree valve angle
  • 270cc CNC'd intake ports
  • 85cc CNC'd exhaust ports
  • 70cc CNC'd combustion chambers
  • Design for big bore LS7/C5R/LSX blocks (min 4.100" bore)
  • All fasteners are metric
  • C5R/LS7 rectangle port design-requires rectangle port intake manifold - 809-25534394
  • Capable of over 600 horsepower!

    LS7 CNC Ported Head Flow Chart
    Valve Lift Intake Flow Exhaust Flow

  • Items You Need