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

2006 SAR/BRODIX BB-5 390CC MAX FLOW MARINE HEADS

feature list

  •   LABOR

    • CNC machined castings

    • Install/fit bronze guides

    • Machine for larger valve springs

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

    • Full competition port

    • Hand contoured by one of our cylinder head experts after CNC machining

    • Machined for springs and seal

    • Flow tested

    • Correct spring height and assemble

    • Chamber volume 125 cc (4.440 bore)

    • Intake runner vol.: Good 403 c.c

    • Bad 419 c.c.

    • Exhaust runner vol.: 149 c.c.

  •   Peak Intake flow:

    Good 418 cfm @ .800” lift @ 28” H2O 405cfm @ .700” lift @ 28” H2O

    Bad 401 cfm @ .800” lift @ 28” H2O 383cfm @ .700” lift @ 28” H2O

    Peak Exh. Flow: 303 cfm @ .800” lift @ 28” H2O 295cfm @ .700” lift @ 28” H2O

Designed by Sonny's *Manufactured by Brodix

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

These BB-5 aluminum heads are the largest intake port BBC head casting available with raised intake ports recommended for 540 cu. in. and larger engines, with capabilities of sustaining 600+ cu. in. Other features include, replaceable bronze guides, valve sizes are 2.300” x 1.920” for supercharged applications and 2.350 x 1.900 for N/A applications. Custom Sonny's heart chamber design is also incorporated in this cylinder head.

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  •   PARTS

    • Manley “Severe Duty” stainless steel valves in 2.350 ex. 1.900

    • Manley titanium 10 deg 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

Race Ready Fully Assembled Heads   $4,920.00