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 3 Power Package represents the pinnacle of bolt-on performance for your 2008-2014 Subaru STI. This package includes everything from the Stage 2.1 package with the addition of the famous GrimmSpeed Top Mount Intercooler. Along with the additional power and torque that your car will be producing thanks to the upgraded intake and exhaust components comes heat in the form of warmer charge air temperatures. It’s important to reduce these temperatures and increase the oxygen density of the pressurized air entering your engine. This additional oxygen will help protect your WRX from knock and allow your tuner to take full advantage of your Stage 3 setup.
On the intake side, 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.
Finally, on the exhaust side, the included GrimmSpeed Downpipe replaces the extremely restrictive factory downpipe and catalytic converter with high quality 3” diameter stainless tubing and a high-flow catalytic converter.
It's important to note that all GrimmSpeed Staged Power Packages require a proper tune.
Stage 3 Package Components
- GrimmSpeed 3-Port Electronic Boost Control Solenoid - Learn More
- GrimmSpeed Cold Air Intake System - Learn More
- GrimmSpeed Catted Downpipe - Learn More
- GrimmSpeed Top Mount Intercooler - Learn More
- GrimmSpeed Top Mount Intercooler Splitter - Learn More
- GrimmSpeed Turbo Heat Shield - Learn More
- GrimmSpeed License Plate Frames - Learn More
Stage 3 Package Features
- Decrease Spool Time - Lower intake restriction and better boost control
- Plug and Play into OEM Harness - No splicing wires like other BCS solutions
- Hybrid Cold Air/Short Ram Design - Combining the advantages and eliminating the negatives of both traditional intake designs
- Custom reusable high flow air filter - Integrated velocity stack entrance smooths incoming air
- Stainless Steel Construction - The downpipe is constructed of high grade 304L SS for corrosion resistance and durability
- Made in the USA - Right here in Minnesota, in fact
- 2-3hr Installation - Straight forward with our written and video guides
The GrimmSpeed Stage 3 Power Package takes the ideology of increasing turbo efficiency to the final level. All the components of this package work together to decrease restriction both before and after the turbocharger, as well as to provide the ultimate choice in boost control. The result is a system that increases both compressor and turbine efficiency, but also works together to control boost. This package further increases horsepower, torque, and engine safety by decreasing charge air temperatures through a vastly superior intercooler design. This is the definitive choice for more boost, faster spool, safety and consistency, and power production.
- 2008 Subaru STI
- 2009 Subaru STI
- 2010 Subaru STI
- 2011 Subaru STI
- 2012 Subaru STI
- 2013 Subaru STI
- 2014 Subaru STI