Toyota GR86 and Subaru BRZ: A Tuner's Guide
Two badges, one lightweight rear-drive coupe built for driver engagement.
The GR86 and BRZ share a 2.4-litre flat-four making 228 hp, rear-wheel drive and a light kerb weight, so they reward chassis work as much as power.
The GR86 and BRZ are the same car wearing different badges, co-developed by Toyota and Subaru around balance rather than brute force.
The engine and drivetrain
Both use the naturally aspirated 2.4-litre FA24 flat-four, rated at 228 hp at 7,000 rpm and 184 lb-ft of torque at 3,700 rpm. Drive goes to the rear wheels through a six-speed manual or a six-speed automatic. A Torsen limited-slip differential is standard, and the low centre of gravity is central to how the car handles.
Why tuners rate it
The appeal is a light, affordable, rear-drive platform shared across two brands, so parts and knowledge are plentiful. The 2.4 addressed the mid-range dip that owners noted on the older 2.0 car. Many owners chase handling and grip first, since the chassis is the highlight, and the naturally aspirated engine keeps things simple.
First mods worth planning
Tyres, a good alignment and suspension bushings transform the car before any engine work. Intake and exhaust changes sharpen response but add modest power on a naturally aspirated engine, so set expectations. Keep the catalytic converter and emissions system intact, because a de-cat is not road-legal in most markets, and keep any tune emissions-compliant.
What to plan for
Big power usually means forced induction, and a supercharger or turbo kit raises the stakes for the clutch, fuelling and engine internals. Track use adds heat, so oil cooling is a common early upgrade. Forced-induction and other changes can void your warranty and must be declared to your insurer, so plan the whole package before you start.
The conditions that matter
- ✓Tyres, alignment and suspension deliver the biggest gains first on this chassis.
- !A de-cat is not road-legal in most markets; keep the emissions system intact.
- !Declare modifications to your insurer and check the warranty impact.
Sources
General guidance, not legal advice. Specifications and road-legality vary by market and change over time; confirm with the manufacturer, your insurer and local regulations before modifying.