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Brodix 2021012 - Brodix Big Block Chevy BB-2 & BB-2 PLUS Aluminum Cylinder Heads

Brodix 2021012 - Brodix Big Block Chevy BB-2 & BB-2 PLUS Aluminum Cylinder Heads

Brodix#158-2021012

BB-2 PLUS Cylinder Head
  • Big Block Chevy
  • Assembled
  • 312cc Rect Intake Ports
  • 119cc Combustion Chambers
  • 2.250'' Intake / 1.880'' Exhaust Valve Seats
  • 1.550'' Dia. Valve Springs - Steel Retainer
  • Mechanical Roller Cam

    Brodix 2021012 - Brodix Big Block Chevy BB-2 & BB-2 PLUS Aluminum Cylinder Heads Details

    BB-2 PLUS Cylinder Head

  • 119cc Combustion Chambers
  • Cylinder Head Specifications

  • Intake Port: 312cc
  • Chamber Volume: 119cc
  • Valve Seat Sizes: Intake 2.250'' / Exhaust 1.880''
  • Valve Springs: 1.550'' dia.; Pressure: 240 lbs.(closed) / 550 lbs.(open); Install Height: 1.950''; Max Lift: .700''
  • Plug Angle: Angle
  • Exhaust Pattern: Standard
  • Valve Centerline: Standard

    Facts and Related Components

  • Torque Heads: 70 ft-lb.
  • Torque Rocker Studs: 40-45 ft-lb.
  • Intake Gasket: Fel-Pro p/n 375-1252-3 or similar
  • Head Gasket: 4.310'' Fel-Pro p/n 375-1027 / 4.540'' Fel-Pro p/n 375-1017
  • Exhaust Gasket: Fel-Pro p/n 375-1411 or similar
  • Head Bolts: ARP p/n 070-135-3606
  • Head Studs: ARP p/n 070-235-4702 (12-point) or similar
  • Accessory bolt holes are drilled
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat
  • Spring Pockets: May NOT be cut any larger or deeper than 1.625''
  • Valve Angle: 26° and 4° Intake; 17° and 4° Exhaust
  • Angle Milling: .0066'' per cc
  • Flat Milling: .0050'' per cc
  • Pushrod Slots: Standard
  • Stud Girdle: Standard
  • Rocker Arms: Standard
  • Lifters: Standard
  • Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
  • Will fit Mark IV, Gen V, and Gen VI blocks

    VALVE SPRING Specs
    1.550'' Diameter Valve Spring
    for Mechanical Flat Tappet & Hydraulic Roller Lifter Cam
  • Spring Pressure Open: 400 lbs.
  • Spring Pressure Closed: 140 lbs.
  • Installed Height: 1.950''
  • Max Lift: .625''
  • 1.550'' Diameter Valve Spring
    for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 550 lbs.
  • Spring Pressure Closed: 240 lbs.
  • Installed Height: 1.950''
  • Max Lift: .700''
  • 1.625'' Diameter Valve Spring
    for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 745 lbs.
  • Spring Pressure Closed: 260 lbs.
  • Installed Height: 2.050''
  • Max Lift: .800''
  • 1.645'' Diameter Valve Spring
    for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 835 lbs.
  • Spring Pressure Closed: 300 lbs.
  • Installed Height: 2.050''
  • Max Lift: .875''
  • Brodix 2021012 - Brodix Big Block Chevy BB-2 & BB-2 PLUS Aluminum Cylinder Heads

    BB-2 & BB-2 PLUS
    The BB-2 and BB-2 Plus heads work well with a heavy car and smaller engine (427-509 cu in). The BB-2 has a 305cc intake port and flows 320 cfm; the BB-2 Plus has a 312cc intake port and flows over 340 cfm with only the bowls blended and the intake ports matched. Both heads may be purchased angle milled to 110cc. The combustion chambers are 119cc and are properly shaped for use with either methanol or gasoline, preventing detonation.


    STS BB-2 PLUS Series
    While creating the STS BB-2 Plus the professionals at Brodix invested many long hours on the flow bench and at the track developing a completely ported version of the BB-2 cylinder head. The Brodix porting design was incorporated into a mirror finish 100% CNC ported masterpiece that can be mass produced while still flowing within 1% of each other.

    Brodix utilizes the many years of racing experience to produce the most accurate, best flowing out-of-the-box cylinder heads available at the best price. These cylinder heads accept all standard pistons, intake manifolds, and rocker arms. The exhaust ports are raised .600' higher than stock, and the valve cover rails are now raised to assure no oil leakage. Made in the USA!

    Note: Sold Individually (1/pkg), unless otherwise noted.

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