JDM RWD /// platform file
Subaru BRZ / GR86 (FA24) build guide
FA24 · 2.4 NA flat-4. What the stock hardware reliably supports, where it breaks first, and the fastest safe path to more.
The Subaru BRZ / GR86 (FA24) makes 228 hp stock at roughly 2,850 lb (12.5 lb/hp). Its stock internals are good for about 400 hp, the fuel system for around 290 hp, and its naturally aspirated setup tops out around 260 hp without forced induction. Below is the limit sheet carbuildcheck analyzes against, plus the platform's documented weak points.
01 Factory card
Stock power228 hp
Curb weight2,850 lb · 12.5 lb/hp
LayoutRWD
InductionNaturally aspirated
02 What stock parts support
Engine internals~400 hp
Fuel system~290 hp
Induction ceiling~260 hp
Clutch (manual)~270 hp
Transmission (auto/DCT)~310 hp
Cooling (sustained)~320 hp
Community-documented crank-hp planning figures, conservative by design. How these are used in the score →
03 Where it breaks first
Early cars had documented RTV-debris oil starvation failures on track — an aftermarket pickup/baffle and fresh oil habits are cheap insurance.
Modest boost with a quality tune is the proven FA24 path — the platform rewards restraint more than peak numbers.
04 The typical path
Intake → headers → tune → cams or forced induction. NA gains are honest but small; the big unlock is boost, and boost starts at the fuel system.
Analyze your BRZ / GR86 (FA24) build
Tap your mods, set a goal. Score, weak link, roadmap. Free, no login.
Check this build →
05 Related platform files