The Subaru BRZ has earned a devoted following for its lightweight chassis, balanced rear‑wheel‑drive layout, and razor‑sharp handling. Yet for many owners, the 228‑horsepower (in later models with the 2.4‑liter FA24 engine) or 205‑horsepower (in earlier 2.0‑liter versions) factory output leaves room for improvement. The sweet spot for a daily‑driver or weekend track car often falls between 200 and 350 horsepower – a range that delivers noticeable gains without demanding a full race‑car build. This article explains how to reach those numbers using DeatschWerks (DW) and Torque Solutions kits, along with supporting modifications and careful tuning.

Understanding the Subaru BRZ’s Engine Platform

The BRZ’s flat‑four boxer engine (FA20 in 2013–2020 models, FA24D in 2022+) is a high‑revving naturally aspirated unit designed for quick throttle response and a low center of gravity. The FA24’s larger displacement – 2.4 liters versus 2.0 – gives it a stronger foundation for moderate power increases. Both engines respond well to improved fueling, optimized air intake, and ECU recalibration. The key to staying in the 200–350hp window is balancing airflow, fuel delivery, and ignition timing while maintaining reliability. Overlooking any one of these areas can lead to detonation, lean conditions, or shortened engine life.

Fuel System Upgrades for the 200–350hp Goal

Fuel delivery is the first bottleneck many BRZ owners encounter when aiming above stock power levels. The factory fuel pump and injectors are adequate for mild bolt‑on modifications, but once you move toward 300 horsepower or add forced induction, you must increase fuel flow and maintain consistent pressure.

DeatschWerks (DW) Fuel Pump Kits

DeatschWerks offers drop‑in fuel pump kits specifically designed for the BRZ. The DW200 and DW300 series are popular choices, providing 200–340 liters per hour of flow – a significant jump over the OEM pump. These pumps are engineered for silent operation (using a turbine‑style impeller) and feature a direct fitment that requires no wiring harness modification. For the 200–350hp range, the DW300c (compact version) is an excellent choice because it supports up to 600 horsepower on return‑style systems, leaving headroom for future upgrades. The installation is straightforward: remove the rear seat, access the fuel tank cover, and swap the pump assembly. A quick tutorial can be found on the DeatschWerks website along with flow charts for various fuel pressure levels.

Fuel Injectors and Fuel Pressure Regulator

When pushing toward the upper end of the 350hp target, higher‑flow injectors become necessary. DeatschWerks also supplies injectors in 550cc, 700cc, and 1000cc sizes. For a supercharged or turbocharged BRZ running 10–12 psi of boost, 700cc injectors are a common match. Pair these with an adjustable fuel pressure regulator (from companies like AEM or Radium) to fine‑tune the pressure and ensure the air‑fuel ratio stays safe across the rev range. Torque Solutions offers a fuel system bundle that includes a high‑flow pump, injector harness adapters, and a regulator – making it a one‑stop solution for the 200–350hp power band.

Engine Management and Tuning Strategies

Hardware is only half the equation. Without proper engine management, even the best fuel system and induction kit will not deliver the power safely. The BRZ’s factory ECU is reasonably flexible but has limitations, especially when boost is added. There are two main paths: reflash the OEM ECU or use a standalone unit. For the 200‑350hp goal, a quality reflash is often sufficient.

ECU Recalibration with OpenFlash or Ecutek

OEM flashes via tools such as Ecutek or OpenFlash Tablet allow a tuner to modify fuel maps, ignition timing, variable valve timing (VVT), and rev limits. When using a DW fuel pump and upgraded injectors, the tuner must rescale the injector latency and flow rates to prevent rich or lean spikes. Many tuners recommend a custom dyno tune rather than a generic off‑the‑shelf map, because each car behaves differently based on altitude, fuel quality, and hardware combination. A dyno‑tuned BRZ with bolt‑ons (intake, header, exhaust) and a DW200 pump can see 230–250 horsepower at the wheels on the FA20, or 260–280 on the FA24.

Torque Solutions Tuning Packages

Torque Solutions has developed a series of plug‑and‑play engine management accessories that simplify the tuning process. Their ECU tuning harnesses allow direct access to the ECU pins for logging and mapping without damaging the factory connectors. More importantly, Torque Solutions offers a “Tuning Kit” that combines a reflash tool, a wideband oxygen sensor, and a boost control solenoid (for forced induction builds). The kit includes base maps for various fuel system setups, including DW pumps. For the enthusiast who wants a safe starting point, this package reduces guesswork. Be sure to check the Torque Solutions website for the most current firmware and map updates.

Intake and Exhaust Modifications

To achieve the target power range, the engine needs to breathe freely. A restrictive intake or exhaust will choke power at higher RPM, even with perfect fueling.

Cold Air Intakes (CAI)

A high‑quality cold air intake, such as the Perrin or Grimmspeed unit, reduces inlet air temperature and improves mass airflow. For the FA24 engine, an intake that maintains a smooth transition to the throttle body is critical. Pair it with a replacement intake manifold spacer (like those from Torque Solutions) to lower intake charge temperatures further by insulating the plenum from engine heat. This is especially beneficial when tuning on a hot day or during track sessions.

Header and Exhaust Upgrades

Replacing the factory header (manifold) with a set of equal‑length or unequal‑length tubes – depending on whether you want a traditional Subaru rumble – unlocks 10–15 horsepower on a naturally aspirated build. For turbo builds, a short runner header with a proper wastegate port is essential to prevent boost creep. From there, a 2.5‑inch or 3‑inch cat‑back exhaust system maintains exhaust velocity while reducing back pressure. When using forced induction, a larger downpipe (divorced wastegate design) is a must to keep exhaust gases flowing smoothly. Many tuners report that a full header‑back exhaust plus a cold air intake adds about 20–30 horsepower on a DW fuel pump setup without any other modifications.

Forced Induction: Reaching the Top End of the Power Band

To touch 350 horsepower, naturally aspirated modifications will likely fall short. Adding a supercharger or turbocharger is the most direct path. Both options work well with DW and Torque Solutions kits, provided the fuel system is upgraded.

Centrifugal Supercharger Kits

Centrifugal superchargers (e.g., from HKS or Vortech) are popular for the BRZ because they deliver linear power that ramps with engine RPM. They place less stress on the valvetrain than a roots‑type blower and are easier to tune. With a DW300 pump, 700cc injectors, and a Torque Solutions boost controller, a centrifugal supercharged FA24 can produce 320–350 horsepower at 8–10 psi on pump gas. The installation is relatively straightforward for a dedicated enthusiast, but a professional tune is mandatory to avoid lean conditions at high RPM.

Turbocharger Kits

Turbocharging offers greater peak horsepower potential and makes the car feel stronger in the mid‑range. Kit suppliers like Full‑Race and Greddy produce bolt‑on kits for the BRZ using a 5862 or similar turbo. With a DW fuel system and a Torque Solutions standalone ECU (or piggyback), a well‑tuned 2.0‑liter BRZ can hit 300–350 horsepower, while the 2.4‑liter can exceed 400, though for the scope of this article 350 is the ceiling. A critical supporting mod is a high‑quality intercooler (air‑to‑air or air‑to‑water) and a heat exchanger that keeps intake temps in check during repeated pulls. Torque Solutions offers a “turbo tuning kit” that includes a boost controller, wideband, and the necessary wiring to interface with the OEM ECU, simplifying the process.

Supporting Modifications for Reliability

Power without reliability is a short‑lived thrill. When tuning a BRZ to 350 horsepower, you must strengthen components that were not designed for that load.

Oil Cooling and Heat Management

The boxer engine’s oiling system is sensitive to high oil temperatures. An oil cooler – such as the Setrab or Mishimoto unit – is a smart addition for any BRZ that will see track time or aggressive street driving. Torque Solutions sells a sandwich plate adapter that fits between the oil filter and block, making installation quick. Additionally, upgrading the radiator (dual‑pass or all‑aluminum) helps maintain coolant temperature. For supercharged setups, a larger heat exchanger for the supercharger’s intercooler is often needed. Without proper cooling, detonation can occur even with a perfect tune.

Clutch and Drivetrain Upgrades

At 300+ horsepower, the stock clutch begins to slip, especially during quick shifts or launch attempts. A stage 2 or stage 3 clutch kit from Exedy or ACT is a wise investment. The BRZ’s five‑speed (in early models) or six‑speed manual transmission is robust, but a short‑shifter and upgraded transmission mount from Torque Solutions improves shift feel and prevents drive‑train slop. A limited‑slip differential with a higher final drive ratio (e.g., 4.44:1) can also make the car feel much faster in the 200–350hp band without adding more power.

Dyno Tuning and Validation

After installing all hardware and flashing a base tune, the car must be taken to a dyno for final calibration. A dyno session allows the tuner to dial in the air‑fuel ratio (aim for 12.0–12.5:1 under boost for gasoline), ignition timing (avoiding knock), and variable valve timing maps. Torque Solutions’ wideband logs should be reviewed to ensure no fuel pressure drop occurs at high RPM. With a DeatschWerks pump, fuel pressure should stay rock‑solid. Expect to spend two to four hours on the dyno for a full custom tune. The result: a safe, strong power curve that meets your target. A well‑tuned BRZ in the 200‑350hp range is a joy to drive, passing both emissions (if the tune is compliant) and reliability checks.

Maintaining Your Tuned BRZ

A tuned car demands more attention than a stock one. Oil changes should be performed every 3,000–4,000 miles using a full synthetic 5W‑30 (or 5W‑40 for hotter climates). Inspect the fuel system regularly: the DW pump’s in‑tank filter can become clogged if debris enters the tank, so use a clean fill and consider an external fuel filter. The Torque Solutions ECU harness should be checked for frayed wires or loose connections. Additionally, because higher horsepower generates more heat, monitor oil and coolant temps through an aftermarket gauge or the Torque Solutions logging app. A common failure point is the stock plastic coolant expansion tank – replace it with an aluminum unit if you run track days.

Conclusion

Reaching the 200–350 horsepower mark in a Subaru BRZ is an achievable goal with the right combination of parts and tuning. DeatschWerks fuel pumps provide the consistent flow needed for bolt‑on and forced induction setups, while Torque Solutions offers the engine management tools and harnesses to dial everything in safely. By supporting those upgrades with proper intake, exhaust, cooling, and driveline modifications, you can build a BRZ that is both fast and reliable. Whether you stay naturally aspirated or add a supercharger, the key is to plan your build stage by stage, dyno‑tune each step, and never skip maintenance. The result is a lightweight sports car that punches well above its weight – exactly what the BRZ was meant to be.