[GoatZillaRacing]

First Look at the SpeedMaster Pontiac Heads. I’m impressed with the casting quality, heli-coils where they need to be, machine work looks good. Oil return looks well thought out. High Performance Injuns is offering these for the introductory price of only $1759 a pair picked up at the shop or customer pays actual shipping.

Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 72 cc
CNC-Machined Combustion Chamber: Yes
Intake Runner Volume (cc): 215 cc
Exhaust Runner Volume (cc): 175 cc
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Intake Port Shape: Ram Air IV
Intake Port Location: Standard
Exhaust Port Shape: Ram Air IV
Exhaust Port Location: Standard
Spark Plug Style: Angled
Comp. Valve Job: Yes
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.110 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.660 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.580 in.
Outside Diameter of Outer Spring (in): 1.450 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Chromoly steel
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Positive stop
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Valve Cover Mounting Style: Center & Perimeter Bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 14 deg.
Exhaust Valve Angle: 14 deg.
Valve Guides Included: Yes
Valve Guide Material: Bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold as a pair.

Assembly Specifications

Max Lift: .580"
Coil Bind: .740"
Intake Install: 135lbs @ 1.8
Exhaust Install: 135lbs @ 1.8
Closed Sear Pressure: 125lbs
Open Seat Pressure: 320lbs