GM Performance Parts SB-Chevy Splayed Valve Alum Race Cyl Heads


GM Performance
GM Performance Parts SB-Chevy Splayed Valve Alum Race Cyl Heads

Product images may differ from actual product appearance.

Departing from the in-line valve head, their splayed-valve castings have a 0.240" minimum port wall thickness so your favorite head porting expert can perform extensive modifications for greater airflow. Intake valve angles are 11 degrees, with a 4 degree tilt. This is an extremely aggressive, all-out competition race head designed to make the absolute maximum power from your small-block Chevy with no regard to streetability. GM Performance's NHRA Competition Eliminator customers routinely make over 1000 horsepower (naturally aspirated) with this cylinder head.




809-12480146
Rough-Machined Splayed-Valve Aluminum Cylinder Head
  • Main surfaces are machined, exhaust bolt pattern is machined
  • Head bolt & dowel holes, intake bolt holes, spark plug holes & pushrod holes are not machined
  • Sold individually
    More info on GM Performance 12480146
  • $1,772.99
    Ships
    02/21/12

    809-12480147
    Semi-Machined Splayed-Valve Aluminum Head
  • Main surfaces are machined, exhaust bolt pattern, valve guides and spark plug holes are machined
  • Head bolt holes, dowel holes, intake bolt holes, pushrod holes are not machined
  • Sold individually
    More info on GM Performance 12480147
  • $1,719.99
    Ships
    02/21/12

    809-12480153
    Splayed-Valve R0X Aluminum Cylinder Head
  • Semi-machined aluminum race head
  • Great for NHRA competition with dual carburetors
  • As cast ports and combustion chambers for professional finishing
  • Sold individually
    More info on GM Performance 12480153
  • $1,291.99
    Ships
    02/21/12

    809-24502517
    Splayed-Valve Aluminum Cylinder Head
  • Semi-machined aluminum race head
  • 240cc "as-cast" intake ports
  • 78cc "as-cast" exhaust ports
  • 45cc "as-cast" combustion chambers
  • Same casting as P/N12480146
  • Sold individually
    View this item
  • $1,502.99
    Ships
    02/21/12
      809-88958684
    Rough Machined Splayed-Valve R0X Aluminum Cylinder Head
  • Main surfaces are machined and exhaust bolt pattern is machined
  • No valve guide or valve seat machining
  • Sold individually
    View this item
  • $1,299.99
    Ships
    02/21/12