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Brodix 1178100

STS BR 7 Series Cylinder Heads 264cc Intake Ports

Brodix 1178100
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158-1178100

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Brodix 1178100 STS BR 7 Series Cylinder Heads 264cc Intake Ports $3,455.64
STS BR 7 Series Cylinder Heads
  • 264cc Intake Ports
  • 72cc Combustion Chambers
  • 2.204'' Intake / 1.614'' Exhaust Valves
  • 1.350'' Dia. Springs - 180# Seat Pressure
  • Steel Retainers
  • Assembled, 2/pkg.

  • Brodix 1178100 Details

    STS BR 7 Series Cylinder Heads

  • 2.204'' Intake Valves
  • 100% CNC Ported
  • Cylinder Head Specifications
  • Intake Port Volume: 264cc
  • Combustion Chamber Volume: 72cc
  • Valves: 2.204'' dia. x 5.200'' o.a.l. Intake / 1.614'' dia. x 5.230'' o.a.l. Exhaust ( 8mm Stem Diameter )
  • Valve Springs: 1.350'' Diameter - Open Pressure: 430 lbs.; Closed Pressure: 180 lbs.; Installed Height: 1.810''; Max Lift: .700''
  • Spring Retainers: 1.290'' 7° Steel
  • Valve Seals: 8mm

    Facts and Related Components
  • Torque Heads: 11mm STUDS - 85 ft-lb. WITH OIL / 8mm STUDS - 26 ft-lb. WITH OIL
  • Torque Rocker Studs: 22 ft-lb.
  • Intake Gasket: Fel-Pro p/n 375-1208-3 (.060), GM p/n 809-19172113
  • Head Gasket: Fel-Pro p/n 375-1185-041 (4.175 bore) or GM p/n 809-12582179
  • Exhaust Gasket: Fel-Pro p/n 375-1440
  • Head Studs: ARP p/n 070-234-4319 (under cut studs)
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat (NGK R5671A)
  • Valve Angle: 12°
  • Flat Milling: .0060'' per cc
  • Dowell Shift: Standard
  • Pushrod Slots: Standard
  • Rocker Arms: LS7 style
  • Lifters: Standard
  • Intake Manifold: LS7 or Equivalent
  • Valve Centerline: Standard
  • Spring Pockets: 1.350'' out of the box, May not be cut any larger or deeper
  • Accessory Bolt Holes are Drilled

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    Yes
    CNC-Machined Exhaust Runner
    Yes
    CNC-Machined Intake Runner
    Yes
    Combustion Chamber Volume (cc)
    71
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    D-Port
    Exhaust Runner Volume (cc)
    221
    Exhaust Valve Angle
    12
    Exhaust Valve Diameter (in.)
    1.614
    Exhaust Valves Included
    Yes
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Port Shape
    Rectangular
    Intake Runner Volume (cc)
    262
    Intake Valve Angle
    12
    Intake Valve Diameter (in.)
    2.204
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.6
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.295
    Quantity
    Sold as a pair
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Centerbolt
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    1178100

    LS7 Design 12° Cylinder Heads from Brodix!

    Brodix delivers the industry's most powerful and durable out-of-the-box LS head in it's class with their BR series. The ''BR 7'' comes standard with 72cc combustion chambers, bowls blended, and intake ports matched. The ''STS BR 7'' is a 100% CNC ported version that flows over 375cfm. The ''BR 7'' and the ''STS BR 7'' both utilize a 12° valve angle and 2.204'' / 1.614'' valve combination. The ''STS BR 7 273'' flows over 415cfm with a 72cc combustion chamber and 2.250'' / 1.614'' valves. The BR-series heads feature the ''6 head bolt per cylinder'' LSX block design but are standard LS block compatible and accepts standard LS7 valvetrain components. The 6-bolt LSX design easily and reliably handles increased cylinder pressures of turbocharged, supercharged or high compression applications. Every casting is poured from A-356 virgin aluminum and tested before Brodix utilizes their in-house processes such as CNC machining and heat treating to assure that you receive the best products for your hard-earned money. Solid, phosphorous bronze guides are used to reduce valve leakage and oil consumption. The ductile iron valve seats are installed for use with unleaded fuel. Sold in Pairs. Made in the USA!

      VALVE SPRING Specs
      1.350'' Diameter Valve Spring for Hydraulic Roller Lifter Cam
  • Spring Pressure Open: 430 lbs.
  • Spring Pressure Closed: 180 lbs.
  • Installed Height: 1.810''
  • Max Lift: .700''
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