Here is our top ten list for modifications you need to do to your 2015-2021 Subaru WRX & STI. There are a lot of different ways to shave lap times, increase HP, and improve your driving experience. Follow this path and avoid wasting your money on mods that don't work!


IAG Performance PTFE Fuel Line Kit for use w/ COBB Flex Fuel Sensor:
https://www.subispeed.com/products/ia...

Nostrum High Performance High Pressure Fuel Pump:
https://www.subispeed.com/products/h1...

COBB Tuning Top Mount Intercooler Kit:
https://www.subispeed.com/products/b4...

GrimmSpeed Front Mount Intercooler Kit WRX:
https://tinyurl.com/bdct29zd

Mishimoto Oil Cooler Kit WRX:
https://www.subispeed.com/products/mi...

Mishimoto Oil Cooler Kit STI:
https://www.subispeed.com/products/mi...

Koyo Aluminum Racing Radiator:
https://www.subispeed.com/products/vh...

Whiteline Front and Rear Sway Bar Kit w/Endlinks:
https://www.subispeed.com/products/bs...

GrimmSpeed Stealthbox Intake System:
https://www.subispeed.com/products/gr...

Cobb Intake:
https://tinyurl.com/yckuffrm

AEM Cold Air Intake System STI:
https://www.subispeed.com/products/ae...

PERRIN Performance J-Pipe with Catalyst:
https://www.subispeed.com/products/ps...

Grimmspeed Downpipe:
https://tinyurl.com/2p8pxpt3

Ohlins Road & Track Coilovers:
https://www.subispeed.com/products/su...

FactionFab F-Spec Performance Lowering Springs:
https://www.subispeed.com/products/1-...

Whiteline Adjustable Lower Control Arms (Rear):
https://www.subispeed.com/products/kt...

Faction Fab brake pads:
https://www.subispeed.com/search?q=Fa...

ATE Original TYP 200 DOT 4 Brake Fluid - 1L:
https://www.subispeed.com/products/70...

Brembo GT Systems 4 Piston Front Big Brake Kit Red With Slotted Rotors:
https://www.subispeed.com/products/1h...

Apex Race Parts EC-7 18x9.5 5x114.3 +38mm:
https://www.subispeed.com/products/ec...

Cobb Accessport:
https://www.subispeed.com/products/ap...