Thitek GIIIH "Bear" - Bare CNC Ported
Thitek GIIIH | CNC Ported CNC Ported Heads, Ready for Your Parts Package.

GIIIH | CNC Ported

The CNC ported bare heads are the exact well designed port programs from the assembled heads. CNC ported with seats and guides installed ready to be finished with your parts package.

Guides and valve job can be ordered finished or unfinished.

NOTE: These are un-assembled, CNC ported cylinder heads. Springs, valves, or other accessories are available, but NOT included.

Tech Specs

  • A356 T6 Aluminum
  • Completely New Casting
  • Form treads
  • Increased Deck thickness
  • Increased port wall thickness
  • Interchangeable (Left – Right)
  • Reinforced Rocker Arm Stands


  • Beehive or Dual Hyd roller valve Springs
  • Coated Titanium Valves
  • Copper Beryllium Valve Seats
  • Custom Port designs available
  • Hollow Stem Valves
  • Inconel Valves
  • Optional 6 bolt head bolt pattern
  • Steel Valve guides
  • Up to 1.550” Dual Solid Roller Springs

Standard Parts

  • Bronze valve guides
  • Ductile Iron Valve seats