Frankenstein 273cc M311 Heads

M311 273cc LS3 Cylinder Heads (SET) w/ Billet Rocker Rails

• Fully CNC ported, 68cc chamber volume
• 273cc intake port, 112cc exhaust port and 11° valve angle
• High Quality Components:
  • Black Nitride Stainless Steel Severe Duty Valves
  • Custom PAC .700” Lift Valve Springs
  • Titanium Retainers
• O-Ringed Exhaust Ports (Hi-Temp Silicone O-rings Included)
  
• 2″ Headers Recommended
• Sold Per Set
  
• Includes Billet Rocker Rails

Available on backorder