2021 Subaru WRX STI Mods, Upgrades & Accessories
WRX STI Upgrades by WRX STI Experts.
The 2021 STI was the last year of production for the VB STI, and thus far, the last remaining model for the US markets. This paused the 17-year run for the legendary EJ25 that remained as the heart of the STI. In Japan at the 2024 Tokyo Auto Salon, Subaru showcased a Special Edition WRX S4 STI Sport prototype that had been based on a JDM WRX S4 Sport Japanese model. It is currently rumored that the next generation of STI will be an all-electric version.
If that is confirmed, the 2021 STI will be the last combustion engine design (for now). Even still, the 2021 STI is still a rally-inspired AWD sedan that packs 300+ HP and has a rich performance aftermarket support system to make this car handle better, drive faster, while looking and sounding more aggressive. The Tomei Expreme Ti Cat-Back Exhaust features full titanium construction that will save a great amount of weight, while adding more horsepower and torque. The Faction Fab FL V2 Coilovers have a wide range of adjustment that include height, front camber settings, and damping stiffness to execute that preferred stance. And you can add more downforce by installing an APR Carbon Fiber Wind Splitter to reduce lift at higher speeds, while making your STI transform into race car mode.
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XKSU23531-2B
Xclutch 9in Twin Sprung Ceramic Clutch Kit - 2015-2021 Subaru STI
7 In Stock
ASM-TAC-731
PERRIN EBCS Pro Boost Control Solenoid - 2015-2021 Subaru STI / 2008-2014 Impreza
3 In Stock
21311AA120
Subaru OEM Oil Cooler w/Seal - 2015-2021 Subaru STI
3 In Stock
HS02SWIAPD
Invidia 3in Downpipe to 2.5in Exhaust Adapter - Subaru Models (Inc. 2004-2021 Subaru STI)
CB-801502B
APR Performance GT3 Mirrors with OEM Style Base - 2015-2021 Subaru WRX / STI
S020B-T-TS
ISC Suspension V2 Basic Track/Race Coilover Kit (With Triple S Upgraded Coilover Springs) - 2015-2021 Subaru WRX / STI
31 In Stock
038007
Grimmspeed Delrin Black Shift Knob - 2002-2014 Subaru WRX / 2004-2021 Subaru STI
3 In Stock
6A1474LA
Cusco Adjustable Rear Toe Arms - 2015-2021 Subaru WRX / STI
1 In Stock
35-300083
Bilstein B8 Performance Strut - 2015-2021 Subaru WRX / STI
26 In Stock
1300.48.11.WRX.4
Injector Dynamics Fuel Injectors 1300cc - 2015-2021 Subaru STI / 2006-2008 Forester / 2002-2014 Impreza
51 In Stock
HS15STIGM4ST
Invidia R400 Gemini Single Layer Cat Back Exhaust - Titanium Burnt Tips - 2015-2021 Subaru WRX / STI
001000150200
Boomba Racing 75mm DBW Throttle Body (Red) - 2004-2021 Subaru STI
50 In Stock
024001
GrimmSpeed Uppipe to Turbo Gasket - 2015-2021 Subaru STI / 2004-2013 Forester / 2002-2014 Impreza
39 In Stock
692026ALHD
Cusco Power Brace Power Steering Rack - 2015-2021 Subaru STI
4 In Stock
001000120000
Boomba Racing Aluminum Oil Cap Natural - Subaru Models (inc. 2002-2021 WRX / STI)
9 In Stock
612005C-4
Manley Performance Platinum Series Piston Set 100mm 8.5:1 - Subaru Models (inc. 2006-2014 Subaru WRX / 2004-2021 Subaru STI)
2 In Stock
HS15STIDTG
Invidia N1 Full Titanium Twin Outlet Cat-Back Exhaust System - 2015-2021 Subaru WRX
TS-SU-881-O
Torque Solution Cast Aluminum HD Hard Turbo Inlet - OEM / 2.4" Coupler - 2002-2007 Subaru WRX / 2004-2021 STI
3 In Stock
TS-SU-427BK
Torque Solution Billet Rear Differential Brace - 2015-2021 Subaru STI
VASU-204
Varis Arising II FRP + Carbon Shroud Side Skirts - 2015-2017 Subaru WRX/STI
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