How to Supercharge Your 2022+ Toyota GR86 & Subaru BRZ

If you want to supercharge your 2022+ Toyota GR86 or Subaru BRZ, the good news is that the FA24 platform responds to boost better than almost any modern naturally aspirated four-cylinder. From the factory the 2.4L flat-four makes 228 hp at 7,000 rpm and 184 lb-ft at 3,700 rpm — quick and communicative, but never fast in a straight line. Bolting on a belt-driven supercharger like the HKS GT2 system changes that character completely, and it does it without the lag or plumbing complexity of a turbo build. In our Tampa shop, forced induction is the number-one upgrade GR86 and BRZ owners ask about, so this guide walks through exactly how to build a supercharged FA24 the right way: the core kit, the supporting mods that keep it alive, and what the install actually involves.

Why Supercharge the 2022+ GR86 and BRZ (FA24)?

A supercharger is the fastest way to add meaningful, usable power to the FA24 boxer engine. The 2.4L unit that Toyota and Subaru introduced for 2022 (chassis codes ZN8 for the GR86 and ZD8 for the BRZ) already fixed the previous FA20's notorious 4,000-rpm torque dip, but it is still a naturally aspirated engine making 184 lb-ft. Forced induction is where the real gains live.

The HKS GT2 is a belt-driven, positive-displacement supercharger, which matters more than the peak number on the box. A positive-displacement blower builds boost almost immediately off idle and delivers it linearly through the rev range — so the car pulls hard from 2,500 rpm all the way to redline, rather than waking up late like a big single-turbo setup. For a chassis this light (roughly 2,830 lbs), that instant, predictable torque transforms corner exits and passing power. Stock, the FA24 runs to 60 mph in about 6.1 seconds; a supported supercharged car cuts that meaningfully and rewrites how the car feels in third gear.

The trade-off is that boost is not a single purchase. Adding roughly 40–50% more airflow means the engine needs more fuel, better cooling, and a recalibrated ECU to run safely. Skip those and you are not saving money — you are borrowing reliability you will pay back later. The sections below cover every supporting system in the order you should buy them.

The HKS GT2 Supercharger System: Your Foundation

The HKS GT2 S/C System is the centerpiece of the build and the reason the rest of the parts list exists. It is a complete, engineered kit for the ZN8/ZD8 FA24 — blower, mounting bracket, intercooler and charge piping, and the hardware to bolt it to a factory long-block. Because it is a full system rather than a universal blower, fitment and belt alignment are sorted out of the box, which is a large part of why it installs cleanly on an unopened engine.

HKS positions the GT2 as the FA24's premier power system rather than a mild bolt-on. Real-world figures depend on final boost, fuel, and tuning, but a well-supported GT2 car generally lands in the 300–330 crank-horsepower window — a jump of roughly 75–100 hp over the 228 hp baseline — with a fat, flat torque curve that stock cars can only dream about. Just as important, positive-displacement blowers are among the most reliable ways to make that power because they run modest boost with a linear delivery, not a violent top-end spike.

Tune and Fuel: Feeding the Supercharger

A supercharger without a tune is a warranty claim waiting to happen. The moment you add boost, the factory ECU calibration is wrong for the new airflow, and the stock fuel system runs out of headroom. These two upgrades are non-negotiable, and you install them alongside the blower — not after.

Step 1: Reflash the ECU (COBB Flash Kit Pro)

The COBB 2022+ Subaru BRZ / Toyota GR86 Flash Kit Pro is how you get a supercharger-specific calibration onto the car. It reflashes the factory ECU over the OBD-II port and unlocks Pro tuner access, so your shop can dial in fueling, ignition timing, and boost targets for the exact GT2 setup on the car. At $725 it is cheap insurance for a $6,800 blower — and it is the difference between a safe, driveable build and a lean, detonating one.

Step 2: Add Fuel Capacity (DeatschWerks Pump + Radium Hanger)

More air demands more fuel. The DeatschWerks DW300C is a 340 lph in-tank pump that ships with a vehicle-specific install kit and drops into the factory location — a direct answer to the extra fuel volume a supercharged FA24 needs. At $122.46 it is the least expensive part on this list and one of the most important. For higher-output or track-driven cars, the Radium 2022+ GR86 / BRZ fuel hanger ($503.45) improves fuel pickup and delivery under sustained lateral load, so the pump never sees air during hard cornering.

Cooling and Airflow for a Boosted FA24

The FA24 runs hot, and boost adds heat everywhere — intake charge, oil, and coolant. If you plan to drive a supercharged GR86 or BRZ hard, especially at a track day in Florida heat, cooling is not optional. Managing intake and oil temperature is what keeps a boosted boxer consistent and reliable lap after lap.

Oil Cooling: HKS S-Type or Mishimoto

Oil temperature is the FA24's real limiter under load. The HKS 2022+ GR86 / BRZ S-Type Oil Cooler Kit ($2,390) is a thermostatic, model-specific system that holds oil temps in check without over-cooling on cold starts. If you want the same protection for less, the Mishimoto thermostatic oil cooler kit ($750.95) is a proven, budget-friendly alternative that also uses a thermostat to reach operating temperature quickly. Either one is a smart addition the moment you add boost.

Intake and Exhaust: Let It Breathe

A supercharger moves more air, so the intake and exhaust need to keep up. The HKS Subaru ZN8/ZD8 Cold Air Intake Full Kit ($1,705) feeds the blower cooler, denser air with a properly sealed airbox — a real gain over an open filter that just breathes hot underhood air. On the other end, a free-flowing catback lets the engine exhale. The REMARK Elite Spec catback ($1,255) is a 304 stainless system with a burnt-tip cover that delivers a purposeful tone without drone, while the HKS LEGAMAX Sports ($1,970) is the choice for owners who want HKS's signature sound and construction end to end.

The Complete Supercharged FA24 Build List

Here is the core parts list for a reliable, street-and-track supercharged GR86 or BRZ, in the order we recommend buying. The supercharger is the headline, but every supporting line makes it safe and repeatable. Together these six components run about $12,997 before installation — the true cost of a done-right boosted FA24.

Handling and Stopping the Extra Power

A supercharged GR86 or BRZ carries corner speed the factory suspension and brakes were never tuned for. Once the engine is done, the chassis is the next honest upgrade. The Ohlins Road & Track coilover system ($2,700) gives you damping control and a lower, flatter stance that makes the added grip usable on both street and track. For stopping power, the Alcon 22–24 GR86 / BRZ 4-piston 332x32mm front race kit ($3,605.49) adds a big-rotor front brake that resists the fade a boosted car will find on a hot session — because making 300+ hp is only half the equation if you cannot slow it down repeatedly.

How to Install It: Steps, Time, and Legality

Installing the HKS GT2 kit is a serious job that involves opening up the top of the engine and integrating the blower, intercooler, and charge piping with the factory intake and fuel systems. It is not a driveway afternoon. Here is the honest order of operations for a supercharged FA24 build:

1. Start with a healthy, unmodified engine. Forced induction multiplies the load on the motor, so confirm compression and oil condition are good before boost. A fresh oil change and quality plugs are the baseline.

2. Mount the supercharger system. The GT2 kit installs the blower, bracket, intercooler, and charge piping. Because it is model-specific, belt alignment and hardware fitment are engineered for the ZN8/ZD8 — but it still requires careful assembly and torque discipline.

3. Upgrade fuel and airflow at the same time. Drop in the DeatschWerks 340 lph pump (and Radium hanger if you are chasing higher output), then fit the HKS cold air intake and catback so the tune has consistent hardware to calibrate against.

4. Add oil cooling. Install the HKS S-Type or Mishimoto thermostatic oil cooler before the car sees sustained load, so your first tuning pulls happen with temperatures already controlled.

5. Flash and dyno-tune last. With the hardware in place, load the COBB Flash Kit Pro and have a qualified tuner dial in fueling, timing, and boost. Never drive a boosted FA24 on a stock or generic calibration.

Budget roughly 8–12 hours of professional shop time for the core supercharger, fuel, and cooling install, plus dyno time to tune. On the legal side, the GT2 kit is a non-CARB (49-state) part: it cannot be sold to or registered in California, and you should confirm your local emissions rules before buying. Our Tampa team can help you spec a complete package and answer fitment questions for either the GR86 or the BRZ.