What is the factory spec for the OEM 2016-19 WRX (VA) front brake (2-piston floating caliper, 316 mm rotor) on a Subaru WRX and STI (VA, 2015-2021)?
Added · Updated
Short answer: Factory specification Confirmed
Verdict:Factory spec Confirmed confidence (3 of 3) · 3 sources
Factory specification: Factory VA WRX front brake: 2-piston floating caliper on a 316 x 30 mm ventilated rotor ('17-inch type') in the 2016 and 2019 manuals, up from the 2008-14 WRX's 294 mm.
Safety-critical part. This spec is confirmed from manufacturer documentation (listed under Sources). Still check it against the factory service manual for your exact car, or have a qualified shop do or check the work.
| Part | OEM 2016-19 WRX (VA) front brake (2-piston floating caliper, 316 mm rotor) |
|---|---|
| Vehicle | Subaru WRX and STI (VA, 2015-2021) |
| Years | 2016-2019 |
| Trim / condition | WRX (STI uses Brembo) |
| Verdict | Factory spec Specification |
| Confidence | Confirmed 3 of 3 — Backed by a manufacturer document, or two or more independent sources agree on a specific checkable fact. |
| Last verified | 2026-10-26 (date the cited sources were last read) |
Details
Factory VA WRX front brake: 2-piston floating caliper on a 316 x 30 mm ventilated rotor ('17-inch type') in the 2016 and 2019 manuals, up from the 2008-14 WRX's 294 mm. The 2015 release says the 2015 WRX got larger front brakes but gives no size, so 2015 is left out.
Specs
- rotor mm: 316 x 30 ventilated
- wheel class: 17-inch type
Other brakes fitment for the VA
- OEM 2008-17 STI Brembo 4-piston front calipers (326 mm rotor) — Fits with extra parts or work Fits with mods
- 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
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
- 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 2-piston floating, 316 x 30, 17-inch type.
- 2019MY WRX / WRX STI service manual G1720BE (book 19STI_US_EN, 2018-03-28) — Subaru Corporation (mfr spec; read 2026-10-26; full page read)
- Subaru announces pricing on all-new 2015 WRX and WRX STI sedans — Subaru of America (PR Newswire) (mfr spec; read 2026-10-26; full page read)2015 WRX: larger front brakes.
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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