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Brodix 1178101

STS BR 7 273 Series Cylinder Heads 273cc Intake Ports

Brodix 1178101
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158-1178101

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Estimated ship date 11/01/17 if Ordered Today
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Brodix 1178101 STS BR 7 273 Series Cylinder Heads 273cc Intake Ports $3,455.64
STS BR 7 273 Series Cylinder Heads
  • 273cc Intake Ports
  • 72cc Combustion Chambers
  • 2.250'' Intake / 1.614'' Exhaust Valves
  • 1.350'' Dia. Springs - 180# Seat Pressure
  • Steel Retainers
  • Assembled, 2/pkg.

  • Brodix 1178101 Details

    STS BR 7 273 Series Cylinder Heads

  • 2.250'' Intake Valves
  • 100% CNC Ported
  • Cylinder Head Specifications
  • Intake Port Volume: 273cc
  • Combustion Chamber Volume: 72cc
  • Valves: 2.250'' 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:

    Manufacturer's Part Number:
    1178101

    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. !

      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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