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GrimmSpeed Post MAF Hose Kit Black-(Subaru WRX / STI 2002-2007)

GrimmSpeed Post MAF Hose Kit Black-(Subaru WRX / STI 2002-2007)

Good Vibes Performance is proud to offer you the best upgrades brought to you by GrimmSpeed. Whether it's a boost controller, replacing gaskets or you're upgrading your up-pipes/down-pipes, we have it here. Get those numbers up and share the Good Vibes.

This is the GrimmSpeed Post MAF Hose Kit. This post-MAF hose combines durable multi-layer silicone fiber and smooth interior walls and CAD technology that makes for an excellent high-performance upgrade over the factory OEM post-MAF hose. This is achieved by eliminating the pockets and corrugated folds in the OEM design to improve the overall flow and throttle response. 




  • Reinforced silicone construction
  • The design removes the OEM corrugated folds and the pockets to create a smooth interior wall
  • Designed with a tapered center portion to make sure the diameter matches the OEM air box and turbo inlet
  • The design eliminates mismatched hose diameter which can create steps that will cause airflow trajectories and small vortexes 
  • The shape of the hose was optimized through CAD Flow Simulation Testing to generate a smoother flow path
  • The removal of the corrugated folds adds a significant reduction in vorticity to calculate the highest flow efficiency
  • The tapered center portion in the design has an emphasis on vorticity to reduce as much turbulence as possible




  • Black finish
  • 4-ply reinforced silicone hose construction
  • CAD-optimized center section to match airbox and inlet for seamless flow
  • GrimmSpeed logo stamped on the airbox side of the hose
  • Includes Breeze hose clamps for the installation


    Brand: GrimmSpeed
    Color: Black
    Includes New Clamps: Yes
    Layers: 4
    Material: Silicone
    Mfgr. Warranty: Lifetime
    Condition: New Product

    Subaru Impreza

    2002 Subaru Impreza WRX
    2003 Subaru Impreza WRX
    2004 Subaru Impreza WRX
    2005 Subaru Impreza WRX
    2006 Subaru Impreza WRX
    2007 Subaru Impreza WRX
    WRX Limited
    2006 Subaru Impreza WRX Limited
    2007 Subaru Impreza WRX Limited
    2004 Subaru Impreza WRX STI
    2005 Subaru Impreza WRX STI
    2006 Subaru Impreza WRX STI
    2007 Subaru Impreza WRX STI
    WRX STI Limited
    2007 Subaru Impreza WRX STI Limited
    WRX TR
    2006 Subaru Impreza WRX TR
    2007 Subaru Impreza WRX TR



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