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GrimmSpeed Stage 1 Power Package [2015-2019 Subaru STi]

GrimmSpeed Stage 1 Power Package [2015-2019 Subaru STi]

Regular price $450.00 USD
Regular price Sale price $450.00 USD
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2015-2019 Subaru STi Stage 1 Power Package by GrimmSpeed

The beauty of the GrimmSpeed Staged Power Packages is that all of the included components were designed and tested to work well together as a complete system. Instead of piecing together parts from many different manufacturers and hoping that they're design theories are compatible, consider starting with one of our excellent Staged Power Packages based on your goals!

The GrimmSpeed Stage 1 Power Package is an excellent place to start when modifying your 2015+ Subaru STI. The upgraded GrimmSpeed 3-Port Boost Control Solenoid offers more accurate and more responsive boost control and is a must when having your vehicle professionally tuned. The GrimmSpeed Intake adds an additional performance increase by reducing pre-turbo restriction, which allows your turbo to build boost more quickly and more efficiently.

With the GrimmSpeed Stage 1 Power Package and a tune, expect to see a decrease in time to spool, rock solid boost control and an increase in torque and horsepower, The Electronic Boost Control Solenoid keeps boost in the system instead of bleeding it away like the factory configuration. This, coupled with its extremely fast and precise response, makes for an invaluable tool for tuning your boost curve. The Cold Air Intake decreases restriction before the turbo’s compressor. This decrease in restriction increases compressor efficiency, which builds boost pressure faster and higher.


  • 3-Port Electronic Boost Controller will plug and Play into OEM Harness
  • Intake combines the advantages and eliminates the negatives of both Cold Air and Short Ram designs
  • MAF sensor location inside heat shield, isolated from engine bay heat
  • Custom reusable high flow air filter w/ integrated velocity stack
  • Made in the USA
  • Extremely simple 60 minute installation with available install guides


  • Accurate and responsive boost control
  • Improves airflow and filtration
  • Reduces pre-turbo restriction
  • Decreases turbo spool time


  • 2015 - 2019 Subaru STi

What's In The Box?

  • 1 - 3-Port Electronic Boost Controller
  • 1 - Stealthbox Cold Air Intake
  • 2 - GrimmSpeed License Plate Frames
  • Couplers, Clamps and Mounting Hardware



  • GrimmSpeed-branded products are warrantied to the original owner against manufacturing defects in materials and workmanship for the lifetime of the product.
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