GM Hemispherical Heads
Designed and Fully CNC Machined By Sonny's

SONNY'S/BRODIX #PB2005 (AS CAST PORTED) 14.5 DEGREE PONTIAC HEADS FLOW 515 CFM
OUT OF THE BOX - PRO STOCK TECHNOLOGY

feature list

  •   • 483/493 cc intake runner volume 515 cfm at .900” lift @ 25” H2O converted to 28” of H2O, using 2.520” intake valve

    • High velocity oval port runners for broader torque curve and quicker acceleration

    • Deep seat registers for stable precision Pro Stock quality valve job

    • Sonny's shallow heart shape combustion chamber allows better flame travel

    • Machined to accomidate Sonny's designed one-piece rocker bar system instead of 16 individual stands
    • Flow tested

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Complete with stainless steel valves, #948 comp springs and titanium retainers   $4,825.00

Additional Options

  • Titanium valve upgrade
  • $1,095.00
  • Sonny's flow modification Pro Stock valve job, bowls blended, chambers blended at seats and intake runners CNC ported 2” deep with smooth transition
  • $ 485.00