Next Level Performance
August 10, 2026 • 11 min read
Learning how to supercharge your 2022–2024 GR86 or BRZ is the single biggest power upgrade you can bolt onto the FA24 flat-four. From the factory the 2.4L makes 228 hp and 184 lb-ft, which lands around 211 wheel horsepower on most dynos – fun, but the chassis is begging for more. The HKS GT2 Supercharger Complete Kit answers that call, taking a properly tuned ZN8/ZD8 to roughly 280–300 wheel horsepower on standard boost. In this how-to guide we walk through exactly what the kit does, what supporting mods you need, how the install works, and the tuning and legality details every GR86 and BRZ owner should know before pulling the trigger.
Our Verdict
The HKS GT2 Supercharger Complete Kit is the cleanest, most streetable path to 280–300 whp on a 2022–2024 GR86 or BRZ.
It is a vehicle-specific, belt-driven centrifugal blower package with a matched air-to-air intercooler, brackets, piping and traction fluid. Pair it with a free-flowing intake and cat-back, budget for a professional install plus ECU calibration, and you have a reliable ~60–70 whp gain on stock internals. Note: it is not CARB-legal in California.
Shop Our Top Pick →Why Supercharge a GR86 or BRZ (FA24)?
Forced induction is the fastest way to fix the one complaint every GR86 and BRZ owner shares: the FA24 needs more grunt. The naturally aspirated 2.4L makes 228 hp at 7,000 rpm and 184 lb-ft at 3,700 rpm, and independent dyno testing of a stock 2022 GR86 recorded about 211 hp and 170 lb-ft at the wheels. The balanced RWD chassis, sharp steering and 7,500 rpm redline are already excellent, so adding boost transforms the car without touching what makes it great.
A supercharger is spun directly off the crankshaft by a belt, so boost builds in lockstep with engine speed. That gives the FA24 an immediate, linear, throttle-tip-in surge with none of the lag associated with a bolt-on turbo – ideal for a lightweight momentum car you drive on canyon roads, track days and the daily commute. At standard pulley boost of roughly 7–9 psi, kits like the HKS GT2 add power on the factory cast pistons and rods without requiring a forged short block.
A boosted FA24 wakes up the GR86/BRZ chassis without changing its balanced character.
The HKS GT2 Supercharger Complete Kit Explained
The HKS GT2 Supercharger Complete Kit is a vehicle-specific forced-induction system engineered for the 2022–2024 ZN8 GR86 and ZD8 BRZ. It uses a belt-driven centrifugal GT2-series supercharger with a revised head unit and larger rotor displacement than the earlier FA20 kit, matched to the FA24’s greater displacement and 7,500 rpm redline. On a properly tuned car it delivers approximately 280–300 wheel horsepower – a gain of roughly 60–70 whp over the ~211 whp stock baseline – on standard boost of about 7–9 psi.
Because it is the Complete Kit, HKS bundles the major hardware needed to run the system: the supercharger head unit, an air-to-air intercooler, mounting brackets, charge piping, and traction fluid, all laid out to minimize install modifications. Professional installation and ECU calibration are still required to run the tune safely. Below is the exact kit we stock and ship (California excluded due to CARB).
Key Specifications – HKS GT2 Kit
What We Like
- + Big, linear ~60–70 whp gain to 280–300 whp on the FA24
- + Complete, vehicle-specific kit: blower, intercooler, brackets, piping, traction fluid
- + Belt-driven centrifugal design keeps power delivery smooth and progressive
Things to Consider
- – Not CARB-legal; cannot ship to or be registered in California
- – Requires professional installation and ECU tuning, which add to the total cost
Supporting Mods: Intake and Exhaust for a Boosted FA24
A supercharger moves far more air than the factory setup, so a boosted FA24 rewards a freer-flowing intake and exhaust. At our Tampa, FL shop we recommend planning the airflow path front to back: a sealed cold-air intake to feed the blower cool, dense air, and a 3-inch cat-back to let the extra volume out. These parts also sharpen throttle response and sound on their own, so they are worthwhile even before you add boost.
A sealed cold-air intake feeds the supercharger cooler, denser air.
The HKS Cold Air Intake Box Kit is the natural match for the GT2 supercharger, using a sealed airbox to keep intake temperatures down under boost. If you want a proven, budget-friendly airflow upgrade, the aFe Takeda Momentum Pro Dry S pairs a one-piece sealed housing with an oil-free, washable Pro DRY S filter for around $400. Both are direct-fit for the gen-2 chassis.
The oil-free Pro DRY S filter is washable and reusable.
For the exhaust side, the AWE Track Edition Cat-Back is our go-to. It is handcrafted from 3-inch and 2.5-inch T304L stainless with .065-inch wall tubing, weighs 23.5 lb versus roughly 35.5 lb for the factory system (about 12 lb lighter), and uses a bullet-style resonator for an aggressive, minimally filtered tone with 5-inch double-walled slash-cut Diamond Black tips. It supports the added flow of a supercharged FA24 while giving the car the voice to match.
5-inch double-walled Diamond Black tips finish the AWE Track Edition cat-back.
GR86 & BRZ FA24 Build Parts Compared
Here is how the forced-induction and airflow parts stack up for a 2022–2024 GR86 or BRZ build. Start with the supercharger as the power adder, then add the intake and exhaust to support it. Prices below reflect current NLP Performance pricing.
| Kit | Role in the Build | Estimated Impact | Price |
|---|---|---|---|
| HKS GT2 Supercharger Complete KitTop Pick | Forced induction (centrifugal supercharger) | +60–70 whp; 280–300 whp total | $6,800.00 |
| AWE Track Edition Cat-Back | Free-flowing 3" stainless exhaust | 12 lb lighter, louder, supports flow | $1,095.00 |
| HKS Cold Air Intake Box Kit | Sealed airbox intake | Cooler, denser air for boost | $770.00 |
| aFe Takeda Pro Dry S Intake | Cold-air intake | Improved airflow & filtration | $387.00 |
How the HKS GT2 Supercharger Install Works
Installing the HKS GT2 kit is an advanced job best handled by an experienced shop, and it typically takes the better part of a full day on the lift. The high-level sequence looks like this:
- Prep and drain: Disconnect the battery, remove the intake, and clear the engine bay to access the accessory drive.
- Mount the blower: Bolt the GT2 supercharger to its vehicle-specific bracket and route the drive belt off the crank pulley.
- Plumb the charge path: Install the air-to-air intercooler and charge piping, then fit the intake feeding the blower.
- Fluids and fasteners: Fill the supercharger with HKS traction fluid and torque every connection to spec.
- Calibrate: Load the HKS engine-management calibration (or a custom tune) and verify air/fuel ratios and boost on a dyno.
Budget for a professional tune as part of the job – the FA24 must be calibrated for the added air and fuel so it runs safely at 7–9 psi. Many owners also add an upgraded fuel supply and a quality cat-back like the AWE Track Edition at the same time to complete the build in one visit.
Tuning, Reliability and Legality
On standard boost the HKS GT2 kit is designed to make reliable power on the FA24’s stock internals. The factory cast pistons and powdered-metal rods are generally comfortable at the kit’s 7–9 psi; pushing boost past roughly 10 psi is where most builders move to forged internals to stay safe. Keep up with oil changes, run quality fuel, and have the car tuned by a shop that knows the FA24 and the supercharger will live a long life.
On legality: the HKS GT2 kit is not CARB-approved, so it cannot be shipped to or registered in California, and it is intended for off-road or track use in states with emissions testing. Always confirm your local rules before installing forced induction. Everywhere else, it is a bolt-on path to a car that feels like a different animal.
Frequently Asked Questions
How much horsepower does the HKS GT2 supercharger add to a GR86 or BRZ?
The HKS GT2 Supercharger Complete Kit takes a properly tuned 2022–2024 GR86 or BRZ to roughly 280–300 wheel horsepower on standard boost, a gain of about 60–70 whp over the ~211 whp stock baseline. It runs approximately 7–9 psi at the standard pulley ratio.
Is the HKS GT2 supercharger kit CARB-legal in California?
No. The HKS GT2 supercharger kit is not CARB-approved and cannot be shipped to or registered in California. It is intended for off-road or track use, so owners in emissions-tested states should confirm local rules before installing.
Supercharger vs turbo for the FA24 GR86 and BRZ – which is better?
A supercharger like the HKS GT2 delivers immediate, linear boost tied to engine rpm with no lag, making it ideal for a lightweight momentum car. Turbo kits can make more peak power (some exceed 350–400 whp) but add lag and heat. For streetable, progressive power on stock internals, the supercharger is the friendlier choice.
What supporting mods do I need with the HKS GT2 kit?
At minimum you need a professional ECU tune. We also recommend a sealed cold-air intake (such as the HKS Cold Air Intake Box or aFe Takeda Pro Dry S) to feed the blower and a 3-inch cat-back like the AWE Track Edition to support the added flow. An upgraded fuel supply is smart on more aggressive setups.
How long does it take to install the HKS GT2 supercharger?
Plan on the better part of a full day of professional shop time to install the HKS GT2 kit, followed by dyno tuning. It is an advanced job involving the accessory drive, intercooler plumbing and engine management, so it is not a driveway install for most owners.
Will a supercharger hurt my stock FA24 engine?
At the kit’s standard 7–9 psi, the HKS GT2 is designed to make reliable power on the factory cast pistons and rods. Problems arise when boost is pushed past about 10 psi without forged internals. With proper tuning, quality fuel and regular maintenance, a standard-boost supercharged FA24 holds up well.
What is included in the HKS GT2 Complete Kit?
The Complete Kit includes the GT2-series centrifugal supercharger head unit, an air-to-air intercooler, mounting brackets, charge piping and traction fluid, laid out to minimize install modifications. Professional installation and ECU calibration are required to run it safely.
Ready to Supercharge Your GR86 or BRZ?
Shop the HKS GT2 kit and the full range of superchargers and forced-induction parts at NLP Performance.
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