Oil Pump Gears, Backing Plate, Valve Spring And Head Stud Combo

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  • $1,454.18 AUD
  • Regular price $1,563.64 AUD
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SKU: Boundary OPG, Boundary BP, 1808-24, 252-4302


Oil Pump Gears, Backing Plate, Valve Spring And Head Stud Combo

The BarraTheWorld.com combo deal is specifically pieced together to simplify your build. This combo deal is perfect for people looking to add a bit more boost or converting their Barra from NA to Turbo, with the added bonus of a cheaper price!

Deal includes:

  • Boundary oil pump gears 
  • Boundary backing plate 
  • Crow cams upgraded springs, your choice of with or without the retainers
  • 12mm Head Studs, your choice of ARP or Optitorque
  • Valve springs without retainer 1808 specifications

    Entry-level valve spring upgrade to suit BA - FGX, these are recommended for ~up to 20 PSI of boost

    Valve Spring Specifications:

    • Installed Height - 1.480"
    • Installed Pressure - 90
    • Pressure @ .5 Lift – 195
    • Max Lift - .550" 
    • Height - .900”
    • Spring Retainer - Use Standard
    • Valve Locks - Use Standard


    Valve springs without retainer 1809 specifications

    Valve spring upgrade to suit BA - FGX, these are recommended for 30+ PSI of boost

    Valve Spring Specifications

    • Installed Height - 1.480"
    • Installed Pressure - 110
    • Pressure @ .5 Lift – 215
    • Max Lift - .600" 
    • Height - .900”
    • Spring Retainer - Use Standard
    • Valve Locks - Use Standard

      Valve springs with retainer 1809 specifications

      Valve spring upgrade kit including Chromoly retainer recommended for applications up to ~30PSI

      Valve Spring Specifications

      • Installed Height – 1.520″
      • Installed Pressure – 105
      • Pressure @ .5 Lift – 205
      • Max Lift – .600″
      • Height  - .900”
      • Spring Retainer – Supplied (10703-24)
      • Valve Locks – Use Standard
      • The kit includes valve springs (1809-24) and Chromoly retainers (10703-24)

    Optitorque head stud specifications 

    • Optitorque Technologies are a USA based specialist fastener manufacturer.
    • Optitorque  Barra head Torque Master studs are rated at an amazing 240,000-260,000psi ultimate tensile strength.
    • Optitorque studs will handle more boost than other head stud kits on the market (excluding ARP Custom Age 625+). These studs offer an economical stud upgrade to ARP2000 without the high expense of CA625+. 
    • Optitorques Nissan RB 1/2″ version has been tested to 90psi boost successfully