Instant Rebates
800.345.4545
Call Our Support Line
24 Hours / 7 Days a Week!  
FREE SHIPPING!
Same Day Shipping Before 11 PM ET
0
My Cart
0
$0.00
Shop By Vehicle
Shop By
Category
Close Menu
Shop By Vehicle
Top Categories
All Categories

All Categories


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

Chevrolet Performance 12629063K

LS-Series LS3 Cylinder Head Kit, Assembled

Chevrolet Performance 12629063K

809-12629063K

jegs shipping
FREE Shipping
Ships
Easy Returns
Easy Returns
Lowest Price Guarantee
Lowest Price Guarantee
Chevrolet Performance 12629063K LS-Series LS3 Cylinder Head Kit, Assembled $1,231.41
LS-Series LS3 Cylinder Head Kit
  • Assembled
    Includes:
  • Cylinder Heads
  • Head Gaskets
  • Head Bolts
  • Valve Cover Gaskets

  • Chevrolet Performance 12629063K Details

    LS3 Aluminum Cylinder Heads

    Kit Includes:
  • Chevrolet Performance LS3 Aluminum Cylinder Heads - 809-12629063
  • Chevrolet Performance Cylinder Head Gaskets - 809-12610046
  • ARP Professional Series Head Bolt Kit - 070-134-3610
  • Fel-Pro Valve Cover Gaskets - 375-VS50504R

  • Specifications:

    Manufacturer's Part Number:
    12629063K

    The LS3 Aluminum Cylinder Heads are stock replacement LS3/L92 heads manufactured from aluminum alloy and are available as bare castings to add your own components or fully assembled with intake and exhaust valves, valve stem seals, spring retainers, valve springs and valve locks. These heads can be used to replace worn or damaged units on your LS3 engine or as a performance upgrade on any LS engine with a 4" or larger bore!

    Features:
  • Manufactured from 319-T5 aluminum alloy
  • As-cast L92 style 260cc intake ports
  • 2.165" hollow stem intake valves
  • 1.59" solid stem exhaust valves
  • 15 degree valve angle
  • .550" max valve lift
  • D-shaped exhaust ports
  • As-cast 68.4cc 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
  • Fits any LS family engine with 4.00" bore or larger

    LS3 Cylinder Head Flow Chart
    Valve Lift Intake Flow Exhaust Flow
    .200151111
    .300208152
    .400256174
    .500294183
    .600316189

  • Items You Need

    Before you leave us... Receive a free catalog or join our email list

    Sign up to receive our catalog or subscribe to our email list now to see our exclusive email only specials, new products, and offers!

    Request CatalogJoin Email List