Will OEM 2008-17 STI Brembo 4-piston front calipers (326 mm rotor) fit a Subaru WRX and STI (VA, 2015-2021)?
Added · Updated
Short answer: Yes, with extra parts or work Limited
Verdict:Fits with mods Limited confidence (1 of 3) · 3 sources
Yes, with extra parts or work: Fits with STI parts, per a retailer's install thread and its brake page.
Safety-critical part. Manufacturer sources are cited, but they disagree or are incomplete for this fitment, so this entry is held below "Confirmed". Have the work done or checked by a qualified professional and confirm figures and part numbers against the service manual or the manufacturer.
| Part | OEM 2008-17 STI Brembo 4-piston front calipers (326 mm rotor) |
|---|---|
| Part comes from | Subaru WRX and STI (GE/GH/GR/GV, 2008-2014) |
| Vehicle | Subaru WRX and STI (VA, 2015-2021) |
| Years | 2015-2021 |
| Trim / condition | WRX (standard on 2015-17 STI) |
| Verdict | Fits with mods Fits with extra parts or work |
| Confidence | Limited 1 of 3 — Forum, Reddit or anecdotal report, or ambiguous/partial detail. Treat as a lead to research. |
| Last verified | 2026-10-26 (date the cited sources were last read) |
Details
Fits with STI parts, per a retailer's install thread and its brake page. 2008+ STI front Brembos bolt to a VA WRX; use any 2005+ STI front rotor (5x114.3, like the VA hub) and STI pads. The factory WRX 17x8 needs a 10 mm spacer to clear; the 18x8.5 WRX wheels clear. The STI's own spec: 4-piston on 326 x 30 mm rotors (2016 manual).
Specs
- pistons mm: 40 x2 + 46 x2
- rotor mm: 326 x 30 ventilated
- wheel class: 17-inch type
- pad mm: 131.8 x 60.5 x 8.9 (2012 manual)
Related build entries
Other brakes fitment for the VA
- OEM 2016-19 WRX (VA) front brake (2-piston floating caliper, 316 mm rotor) — Specification Factory spec
- OEM 2008-17 STI Brembo 2-piston rear calipers (316 mm rotor) — Fits with extra parts or work Fits with mods
- OEM 2018-19 STI Brembo 6-piston front calipers (340 mm rotor) — Fits with extra parts or work Fits with mods
- 2004-2007 STI front Brembo calipers — Fits with extra parts or work Fits with mods
This part on other generations
- Subaru WRX and STI (GE/GH/GR/GV, 2008-2014) — Fits with extra parts or work Fits with mods
- Subaru WRX (GD/GG, 2002-2007) — Fits with extra parts or work Fits with mods
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
Sources
- 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)Black 2008+ fronts bolt on; 2005+ STI rotors, STI pads; WRX 17x8 needs 10 mm spacer.
- STi Brembo Brakes — FastWRX.com (Mach V Motorsports, Subaru parts retailer) (vendor article; read 2026-10-26; full page read)2015+ WRX takes the same calipers as 2014 but uses 5x114.3 rotors.
- 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)STI front Brembo 4-piston 326 x 30.
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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