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WRX/STI Phenolic Thermal Intake Spacers -- 19mm

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Product Description

For 2002+ Subaru turbo 4-cylinder engines - WRX, STI, Legacy GT, and Forester XT.

  • Why 19mm?  Because people requested it, and because we can!
    • Normally used for custom intake manifold applications.
  • New improved material!
    • Insulates 20% better than conventional phenolic spacers.
    • Higher heat resistance.
    • Better strength and mechanical properties.
    • Better chemical resistance
    • No increase in price!


  • Includes 2 phenolic spacers and and pins (4 OEM gaskets are optional but recommended).
    • Note: no longer bolts are included due to varying applications for these spacers.
  • Made in USA from tough military-spec. phenolic composite - not cheap plastic like the others.
    • Phenolic has been used for decades to insulate intake manifolds. Even Ford SVO sells them.
  • 19mm thickness is recommended for custom applications only.
    • Check hood clearance before ordering, especially with stock intake manifolds!
  • Insulates the intake manifold and TGV housing from the heat coming up from the cylinder heads.
  • Reduces the intake manifold runner temperature keeping the charge air cooler and denser for more power.
  • CNC machined to match the head port (not the gasket) for smoothest flow. Ours are the only spacers like this.  Allows port matching!
  • These are the thickest, best-insulating spacers available for a Subaru anywhere.
  • For those with top-mount intercoolers (TMIC) these thicker spacers will not work. Please use KSTech 3mm spacers.


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