Next Level Performance
September 9, 2026 • 11 min read
Our Verdict
The HKS GT2 supercharger is the cleanest turnkey way to push the 2022-2024 GR86 and BRZ from 228 hp to roughly 280–300 whp on a factory-reliable, intercooled setup.
This complete FA24 kit ships with the centrifugal blower, a front-mount intercooler, brackets, and plumbing, and it runs about 7–9 psi on the standard pulley while retaining the OE catted manifold. Budget for supporting fuel, cooling, and airflow before your first pull.
Shop Our Top Pick →The HKS GT2 supercharger kit for the 2022–2024 Toyota GR86 and Subaru BRZ is the single biggest power upgrade you can bolt to the FA24 boxer, and it answers the one complaint owners have voiced since day one: the naturally aspirated 2.4L makes a usable 228 horsepower but never feels violent. At NLP Performance in Tampa, FL, forced induction is the most-requested build path for the ZN8/ZD8 chassis, and this centrifugal blower is the kit customers ask about by name. In this review we break down real power figures, boost pressure, what is actually in the box, the supporting mods you cannot skip, and whether the roughly $6,800 investment is worth it.
What Is the HKS GT2 Supercharger for the GR86 & BRZ?
The HKS GT2 supercharger is a belt-driven, centrifugal forced-induction system engineered specifically for the 2022–2024 GR86 (ZN8) and BRZ (ZD8) with the 2.4L FA24 engine. The GT2 head unit borrows compressor technology from HKS's GTII turbocharger line, spinning a larger rotor than the older FA20 kit to match the FA24's greater displacement and airflow. Because it is centrifugal, boost builds linearly with rpm rather than arriving all at once, which preserves the light, rev-happy character that makes these cars fun while adding real top-end punch.
Crucially, HKS designed the GT2 to work with the factory catted exhaust manifold, so the installation stays comparatively clean and keeps the emissions hardware in place. The complete kit is a supercharger system rather than a bare blower: it includes the front-mount intercooler, mounting brackets, charge piping, and the oiling and tensioning parts needed for a full install. Note that this kit is not CARB-approved and cannot be shipped to California addresses.
How Much Power Does the HKS GT2 Add to the FA24?
On a properly tuned FA24, the HKS GT2 supercharger produces roughly 280–300 wheel horsepower, a gain of about 60–70 whp over a stock 2022–2024 GR86 or BRZ. From the factory, the FA24 makes 228 hp at 7,000 rpm and 184 lb-ft at 3,700 rpm from 2,387 cc, so the blower represents a step-change in output rather than a marginal bolt-on. HKS quotes the standard pulley at approximately 7–9 psi, and the drive ratio is calibrated for the FA24's roughly 7,500 rpm operating range so the car keeps pulling to redline.
HKS's own bench data for the US-spec car shows peak output climbing to about 202 kW (roughly 271 crank horsepower) with a corresponding torque jump to 309 N·m (about 228 lb-ft) — a torque increase of roughly 74 N·m over stock. With HKS's F-CON iS engine management and advanced tuning, the system can be optimized to around 297 PS (about 293 hp). In plain terms: the supercharger turns a car that dips in the midrange into one that pulls hard from 3,500 rpm to the top of the tach.
Key Specifications — HKS GT2 S/C (FA24)
What's in the HKS GT2 Complete Kit?
The complete kit is a full system, not just a blower. It bundles the GT2 centrifugal supercharger head, a front-mount intercooler and charge piping, all mounting brackets and the drive/tensioner hardware, and the oil-feed plumbing the unit needs. That completeness is why it commands a premium over the base Pro Kit — you are not sourcing an intercooler, brackets, and piping separately. Below is the exact kit we recommend for a 2022–2024 ZN8/ZD8 build.
What We Like
- + Roughly 60–70 whp gain with linear, lag-free centrifugal delivery
- + Complete system: front-mount intercooler, brackets, and piping included
- + Retains the factory catted manifold for a cleaner install
Things to Consider
- – Not CARB-approved — cannot ship to California
- – Requires tuning plus supporting fuel and cooling mods to run safely
Supporting Mods: Fueling, Cooling & Airflow for a Supercharged FA24
A supercharger is only as safe as the fuel, oil, and air systems feeding it. Boost raises cylinder pressure and heat, so the FA24 needs more fuel volume, better oil-temperature control, and clean, cool intake air to make the numbers above without leaning out or heat-soaking on track. Here are the ZN8/ZD8-specific parts we stage alongside every GT2 build in our Tampa shop.
Oil-temp control is the first supporting mod for a boosted FA24 — heat is the enemy of a supercharged boxer.
A sealed airbox feeds the blower cooler, denser air than an exposed cone filter under the hood.
A Radium dual catch can keeps oil vapor out of the intake charge — cheap insurance on a boosted direct-injection FA24.
Supercharged FA24 Build Sheet: Kit & Supporting Mods
Use this build sheet to price out a complete, reliable HKS GT2 supercharger install for your 2022–2024 GR86 or BRZ. Prices shown are current at publish and update live; expect the core kit plus supporting hardware to land in roughly the $10,000–$12,000 range before tuning and labor.
| Kit | Role | Key Spec | Price |
|---|---|---|---|
| HKS GT2 S/C Complete KitTop Pick | Forced induction | 280–300 whp, 7–9 psi | $6,800.00 |
| HKS S-Type Oil Cooler Kit | Oil cooling | FA24-specific, S-Type core | $2,390.00 |
| Remark Sports Touring Cat-Back | Exhaust | Stainless, burnt tip | $1,255.00 |
| HKS Cold Air Intake Box Kit | Intake | Sealed airbox, dry filter | $770.00 |
| Radium Fuel Hanger | Fueling | Dual-pump capable | $503.45 |
The FA24's factory fuel system is sized for 228 hp — boost demands a higher-flow hanger and pumps.
Supercharger vs Turbo: Which Boost Path for the FA24?
For the second-generation FA24 car, the HKS GT2 supercharger is the most turnkey forced-induction route because it packages the blower, intercooler, and plumbing in one kit and keeps power delivery linear and predictable. A centrifugal supercharger builds boost with engine speed, so throttle response stays crisp and there is no turbo lag — ideal for a lightweight, momentum-driven chassis like the GR86 and BRZ. The trade-off is that peak boost arrives up high, so the biggest gains show in the top half of the rev range.
Turbo kits can ultimately make more peak power, but they add heat, complexity, and lag, and quality bolt-on turbo systems for the 2.4L FA24 are far less plug-and-play than this HKS system. For a street-and-track ZN8/ZD8 that owners want to remain reliable and daily-usable, the supercharger is the setup we recommend most often. If you want to talk through supercharger versus turbo for your specific goals, our Tampa, FL team builds these cars every week.
Catch cans keep oil vapor out of the charge path and help protect ring lands on a boosted direct-injection engine.
Install & Tuning Notes
Plan for professional installation and tuning. The GT2 kit is comprehensive, but a supercharged FA24 must be tuned to manage the added 7–9 psi safely; HKS offers the F-CON iS engine-management platform to unlock the system's full potential, and a competent tune is what separates 271 crank horsepower from a fully optimized ~293 hp result. Before the first pull, confirm your fuel system can support the added demand (hence the upgraded fuel hanger and pumps), install the oil cooler to keep temperatures in check, and seal the intake so the blower ingests cool air. Because the kit is not CARB-approved, it is intended for off-road or track use in emissions-controlled states and cannot ship to California.
Frequently Asked Questions
How much horsepower does the HKS GT2 supercharger add to a GR86 or BRZ?
On a properly tuned 2022–2024 GR86 or BRZ, the HKS GT2 supercharger produces roughly 280–300 wheel horsepower, a gain of about 60–70 whp over the stock 228-hp FA24. HKS quotes peak output up to around 297 PS (about 293 hp) with its F-CON iS management and advanced tuning.
How much boost does the HKS GT2 kit run?
The HKS GT2 supercharger runs approximately 7–9 psi on the standard pulley. Because it is a centrifugal blower, boost builds progressively with engine rpm rather than all at once, which keeps throttle response linear and lag-free on the FA24.
What supporting mods do I need with the HKS GT2 supercharger?
Plan for upgraded fueling, oil cooling, and a sealed intake. We stage a Radium fuel hanger (with higher-flow pumps), the HKS S-Type oil cooler kit, and the HKS cold-air intake box on every GT2 build, plus a proper tune. A catch can and a freer-flowing cat-back exhaust round out a reliable, complete package.
Is the HKS GT2 supercharger CARB-legal in California?
No. The HKS GT2 supercharger complete kit is not CARB-approved and cannot be shipped to California addresses. It is intended for off-road or competition use in emissions-restricted states; buyers elsewhere should confirm local regulations before installing.
Does the HKS GT2 kit fit both the Toyota GR86 and Subaru BRZ?
Yes. This complete kit fits the 2022–2024 Toyota GR86 (ZN8) and Subaru BRZ (ZD8) with the 2.4L FA24 engine, which share the same drivetrain. It does not fit the first-generation 2013–2021 FA20 cars, which use a different HKS forced-induction kit.
How much does a complete supercharged FA24 build cost?
The HKS GT2 complete kit is around $6,800. With the recommended supporting mods — oil cooler, fuel hanger, intake, cat-back, and catch can — parts land in roughly the $10,000–$12,000 range before professional tuning and installation labor.
Ready to Supercharge Your GR86 or BRZ?
Shop the HKS GT2 kit and every supporting mod for your FA24 build at NLP Performance.
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