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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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Ships 12/19/16 if Ordered Today
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. 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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