Subaru WRX and STI (VA, 2015-2021): Brakes mods
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What are the best brakes mods for the Subaru WRX and STI (VA, 2015-2021)?
It depends on the car’s condition and how you use it. These are the 1 brakes build entry we have sourced for this car: Fit STI Brembos to a 2015-21 WRX (Limited). Each lists caveats, related problems and sources so you can match it to your goal.
Fit STI Brembos to a 2015-21 WRX Limited
A retailer's install thread fits 2008+ black STI Brembos front and rear to a 2015 WRX with any 2005+ STI front rotor, 2008+ STI rear rotors, STI pads and STI rear lines. Front rotors grow from 316 mm to 326 mm; rears go from a solid rotor to vented.
Caveats: The factory WRX 17x8 needs a 10 mm spacer to clear; 18x8.5 WRX wheels clear. Cars with the electric parking brake are not covered for rear swaps. Retailer sources only.
Parts: OEM 2008-17 STI Brembo 4-piston front calipers (326 mm rotor), OEM 2008-17 STI Brembo 2-piston rear calipers (316 mm rotor), OEM 2018-19 STI Brembo 6-piston front calipers (340 mm rotor), 2004-2007 STI front Brembo calipers
Sources (4)
- Pictorial: Installing STi Brembos on 2015+ WRX — NASIOC forum (thread written by a Subaru parts retailer's staff, January 2015, edited 2017) (forum thread; read 2026-10-26; full page read)
- STi Brembo Brakes — FastWRX.com (Mach V Motorsports, Subaru parts retailer) (vendor article; read 2026-10-26; full page read)
- Subaru STI 6-Piston/2-Piston Brembo Brake Kit — FastWRX.com (Mach V Motorsports, Subaru parts retailer) (vendor article; read 2026-10-26; full page read)
- 2016MY WRX and WRX STI service manual G1230BE (book 16STI_US_EN, 2016-11-11) — Subaru (Fuji Heavy Industries) (mfr spec; read 2026-10-26; full page read)WRX front 316 mm; STI front 326 mm.
More for this car
- All Subaru WRX and STI (VA, 2015-2021) fitment answers · VA common problems
- Newsletter archive: past issues with every new and corrected entry
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