Edelbrock 61905 Performer Aluminum Cylinder Head Features:

• Delivers 24 horsepower over stock and raises the peak power level by 500 rpm.
• Accepts factory-style self-aligning rockers.
• Accepts factory center bolt valve covers.
• Features exhaust ports in the stock location for use with stock or aftermarket exhaust manifolds and headers.

  Combustion Chamber Volume:	54cc
  Intake Runner Volume:	170cc
  Exhaust Runner Volume:	60cc
  Intake Valve Diameter:	1.94'
  Exhaust Valve Diameter:	1.55'
  Valve Stem Diameter:	11/32'
  Valve Guides:	Manganese Bronze
  Deck Thickness:	5/8'
  Valve Spring Diameter:	1.46'
  Valve Spring Maximum Lift:	0.600'
  Rocker Stud:	3/8'
  Guideplate:	N/A
  Pushrod Diameter:	5/16'
  Valve Angle:	23°
  Exhaust Port Location:	Stock
  Spark Plug Fitment:	14mm x 3/4' Reach, Gasket Seat

  
  
  

  Valve Lift	Intake	Exhaust
  .100'	61	52
  .200'	117	100
  .300'	174	140
  .400'	220	167
  .500'	242	184
  .600'	232	192
  .700'	N/A	N/A
  Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O