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

2007 SAR/BRODIX BB-5 400 CC OVAL MAX FLOW HEADS

 

At SAR all head porting is done in house. We use a state of the art 5 axis CNC vertical machining center, which can produce precision work to programmed "blue print" specs.

The BB-5 heads are the largest intake port BBC head castings, with raised port aluminum cylinder heads recommended for 565 cu. in. and larger engines, with capabilities of sustaining 600 + cu. in. Other features include replaceable step bronze guides, 2.350" x 1.900". Custom Sonny's heart shape chamber design is also incorporated in this cylinder head.
  •   LABOR

    • CNC machined castings

    • Install/fit bronze guides

    • Machine for larger valves

    • Precision, multi-angle valve job and equalize seat depth

    • Full competition port, polish and flow test

    • Hand contoured by one of our cylinder head experts

    • Machine for Vasco-Jet springs and teflon seals

    • Mill for compression

    • Pressure check

    • Correct spring height and assemble

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PARTS

• Manley "Severe Duty" stainless steel valves

• Manley titanium 10 degree retainers

• Manley 10 degree hardened locks

• Manley hardened spring cups

• Manley Vasco - jet springs

• Manley 8740 rocker studs

• Comp guide plates

• Teflon valve seals

• 11/32" bronze guides

• Chamber volume 113.5 cc

• In. runner vol.: 400 cc

• Ex. runner vol.: 149 c.c.

• Peak in. flow: 445 cfm @ .900” lift

• Peak ex. flow: 311 cfm @ .800" lift with 28" H20

Fully race prepared CNC ported castings $4,075.00

Race ready fully assembled heads $4,920.00