Select Vehicle
Select Vehicle

Subaru WRX STI (2015–2021) Brakes FAQ's

Please read our FAQs page to find out more.

Which brake upgrades make the biggest difference on the VA‑chassis STI?

Track‑capable pads, high‑carbon or two‑piece rotors, stainless lines, and high‑temp DOT 4 fluid dramatically improve heat capacity and pedal consistency.

Do two‑piece rotors help on mixed street/track STIs?

Yes—aluminum hats cut unsprung mass and shed heat faster, helping maintain bite while reducing the risk of rotor coning or cracking in repeated hot sessions.

How should I pick pad compounds for an STI that’s a daily and weekend track car?

Run a street‑sport pad for commuting and a dual‑purpose or track pad for events. Always bed pads to the rotor per the manufacturer’s STI‑specific guidance.