2015-2021 Subaru WRX Engine

The long-awaited GrimmSpeed Bypass Valves are here! Our passion for building the most robust, best-performing parts on the market has driven us to ...

This kit is designed to provide a way to data log and monitor the ethanol content of fuel on most new Subaru Vehicles. Our proprietary controller r...

At GrimmSpeed we know that not everyone is ready for one of our full aftermarket intake systems, but still wants a safe and easy way to increase po...

One of the biggest complaints we’ve heard from 2015-21 WRX owners has to do with cracks forming in their OEM plastic turbo inlets from removal, ins...

See the video below to see how badly the stock BPV leaks! We were able to pick up 15 hp and 9 tq from switching to our piece.   This high performan...

The turbo studs on the FA turbo motors are notoriously difficult to deal with. If you're lucky enough to get the nuts off without drama originally,...

The GrimmSpeed Alternator/Pulley Covers, Fender Shrouds and Radiator Shrouds are NOW available in our all new neon green color option, both individ...

The GrimmSpeed Charge Pipe Kit replaces the restrictive stock plastic unit on the FA20-powered WRX with larger diameter CNC mandrel bent aluminum t...

GESI Catalytic Converter - Comes as standard in all V2 J-Pipes 304 Stainless Steel Construction - Using the BEST materials in the industry Thick 1...

Inspiration for the StealthBox Intake came from internal discussions about what we wanted from an intake system for the 2015+ WRX. Of course perfor...

The PERRIN High Flow Washable Replacement Air Filter is the last filter you will ever need to buy. Not only is it washable, but it will increase ho...

6A1 540 A * Type 1 Aluminum Oval shape * Steel Blue Bracket Light weight aluminum oval shaft, strong & durable.

This kit is designed to provide a way to data log and monitor the ethanol content of fuel on most new Subaru Vehicles. Our proprietary controller r...

Add horsepower, quicker response, and reliability with the PERRIN BOV/BPV. A must-have replacement for the leaky, slow responding, and plastic OEM...

An Elegantly-Engineered Solution. If you've been in the Subaru game for long, you're probably well aware that a 3-port Electronic Boost Control Sol...

Not a Catch Can The Perrin Air Oil Separator is not a catch can. Catch cans capture engine blow-by and stores it in a container, which requires co...

Performance During cornering, the Perrin Strut Tower Brace improves chassis rigidity, enhances steering precision under high load conditions, and r...

Add a little style to your hood struts by swapping them for these carbon fiber topped ones. Same OE style reliability with improved looks. Each gas...

An oil filler cap that combines a resin cover with an aluminum base cap that has been die-cast and cut. The shape of the cap is carefully designed ...

Turbochargers work on the basis of heat energy and keeping the turbo as hot as possible. By containing as much heat as possible within the turbine ...

Turbochargers work on the basis of heat energy and keeping the turbo as hot as possible. By containing as much heat as possible within the turbine ...

At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi-layer steel OEM style gaskets. Th...

Constructed with 100% polyurethane on all four sides, this high flow, oiled OE replacement performance filter will out flow stock paper filter for ...

The TurboXS 2015+ Subaru WRX Front Mount Intercooler Kit might be the single best modification you can do to your 2015-2016 WRX.  One of the bigges...

The pitch stop is designed to reduce front to back engine movement under acceleration and braking. In order to achieve maximum comfort, the factory...

The PERRIN Electronic Boost Control Solenoid (EBCS) Pro is designed to control today's high performance turbochargers with its ultra-fast response ...

6A1 561 ALHD * USDM / LHD application * Steel Blue Bracket Upon hard braking, the sheet metal of the firewall flexes immensely from hydraulic press...

Steel * Bolt on installation * Only for 6 Speed MT Protect Inner joint grease from high heat from muffler front pipe.

* Steel * Bolt on installation * Only for 6 Speed MT Protect Inner joint grease from high heat from muffler front pipe. 6A1 047 F

Here, you are looking at the Tomei Expreme Unequal Length Exhaust Manifold Kit. What is special about this particular header, is that it is the wor...

PLM Cold Air Intake with Heat ShieldVehicle Applications: 2015 - 2019 Subaru WRX Fits only US Market WRX due to different variations in body panel...

50 State Legal Simple ECU flashing with gauge package! The new in-cabin mountable Accessport V3 has a large, full color, higher resolution screen ...

ETS 2015+ Subaru WRX Front Mount Intercooler Piping Kit Only For a complete kit you can add the intercooler seen here. The ETS intercooler piping k...

Description The blades that promote even temperatures and airflow through your engine bay, while giving your Subaru an outstanding visual upgrade....

Description Compressive Tuning is proud to present into its ever expanding hand-crafted product lineup, the EngineArt series carbon fiber d...

For those wanting nothing but the best, the Beatrush Titanium front strut bar delivers just that.  Weighing a mere 1.2kg or 2.6lbs, not only are yo...