CYLINDER HEADS - Pro-Port™ Raw & Semi-Finished Heads - Pontiac
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PERFORMER RPM PONTIAC SEMI-FINISHED
Semi-finished head #60509 includes 14° valve angle, installed guides & seats and no intake pushrod holes.
Chamber Size (a) Int. Port Dim. (b) Exh. Port Dim. (b) Valve Sizes in/ex. (c) Single HIP'd
72cc 1.10" x 2.02" 1.46" x 1.40" 2.11" / 1.66" #60509* N/A

ADDITIONAL SPECS FOR PRO-PORT RAW & SEMI-FINISHED HEADS
 Valve Position   
 
   
   Intake Pierce Point Exhaust Pierce Point        
Head Valve Angle Xiv Yiv Xev Yev Spacing Valve Seats Guides
61989 15° 0.820 0.024 1.090 0.024 1.910 Installed Installed
61999 15° 0.820 0.024 1.090 0.024 1.910 None Installed
(a) Unfinished size
(b) Dimensions at port entry/exit
(c) Maximum size (each valve; may not be used together)
(*) Not legal for sale or use on pollution controlled motor vehicles.
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