Grimmspeed Stage 3 Power Package - 15+ Subaru WRX

12 In stock
Cold Air Intakes
Grimmspeed Stage 3 Power Package - 15+ Subaru WRX Stage 3 Package Components GrimmSpeed 3-Port Electronic Boost Control Solenoid GrimmSpeed StealthBox Cold Air Intake System GrimmSpeed Catted J-Pipe GrimmSpeed Top Mount Intercooler GrimmSpeed Intercooler Charge Pipe GrimmSpeed License Plate Frames The beauty of the GrimmSpeed Stage Power Packages is that...

Grimmspeed Stage 3 Power Package - 15+ Subaru WRX

Stage 3 Package Components

The beauty of the GrimmSpeed Stage 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 their design theories are compatible, consider starting with one of our excellent power packages designed to work as one unit.

The GrimmSpeed Stage 3 Power Package has everything you need to capture the power you are looking for in 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. The GrimmSpeed Catted Downpipe replaces the restrictive OEM Downpipe and makes your engine exhaust gas flow smoother and faster.

The GrimmSpeed Stage 3 Power Package features the same components of the Stage 1-2 Packages, but further increases the performance of the engine with the inclusion of the GrimmSpeed Top Mount Intercoooler, Splitter and Heatshield.


  • 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
  • Downpipe constructed of high grade 304L Stainless Steel for corrosion resistance and durability
  • High flow 300 cell metallic substrate catalytic converter in the downpipe
  • High-Density, High-Flow Intercooler Core optimizes heat transfer and minimizes flow restriction
  • Made right here in the USA
  • Straight forward installation with available install guides


  • Accurate and responsive boost control
  • Improves airflow and filtration
  • Reduces pre-turbo restriction
  • Decreases turbo spool time
  • Increases exhaust flow
  • Dramatically improves performance potential
  • Improves system cooling and minimizes restriction

Please Note: All GrimmSpeed Staged Power Packages require a proper tune.

This Part Fits:


Year Make Model Submodel
2015-2020 Subaru WRX Base
2015-2020 Subaru WRX Limited
2015-2020 Subaru WRX Premium


Nationwide shipping available for most items. For Special Order items expect extended wait times. If your special order is urgent please contact us before ordering to get an Estimated Time (Subject to Manufacturer delays outside of Belfast control).


Contact us with any issues prior to returning any product. an RMA authorization must be made before returns can be accepted.

Grimmspeed Stage 3 Power Package - 15+ Subaru WRX
You have successfully subscribed!
You're already registered (Nice!)