Unlocking the Full Potential of the Subaru BRZ FA24

The Subaru BRZ FA24 has quickly established itself as a driver's darling, celebrated for its lightweight chassis, precise steering, and rear-wheel-drive dynamics. With the 2.4-liter FA24D engine under the hood, the current-generation BRZ delivers a robust 228 horsepower from the factory, a significant step up from its predecessor. Yet for many owners, the hunger for more power is a constant companion. The aftermarket has responded, and one of the most compelling options on the market today is the Complete Performance Package for the BRZ FA24, which promises a verified gain of 60 horsepower for a total of $4,500. This package is not just a collection of parts; it is a carefully engineered system designed to transform the BRZ from a naturally aspirated sports car into a true performer that punches well above its weight class.

In this expanded guide, we will take a deep dive into every aspect of this performance package. We will examine each component, explain the engineering principles behind the gains, discuss the real-world driving benefits, and address common questions about installation, maintenance, and reliability. Whether you are an experienced track day enthusiast or a weekend warrior looking for more excitement on your favorite back roads, understanding this package will help you make an informed decision about elevating your BRZ experience.

What Is the Complete Performance Package for the BRZ FA24?

The Complete Performance Package is a bolt-on, integrated system of performance upgrades specifically engineered for the Subaru BRZ equipped with the FA24 engine. Rather than forcing owners to piece together components from different manufacturers, this package delivers a pre-matched set of parts that have been tested and calibrated to work in harmony. The stated goal is a gain of approximately 60 horsepower at the wheels, which translates to a significant improvement in power-to-weight ratio and overall driving excitement.

This package is particularly attractive because it focuses on naturally aspirated gains, avoiding the complexity, cost, and potential reliability concerns associated with forced induction. By optimizing airflow, fuel delivery, ignition, and rotational mass, the package extracts the latent power that Subaru engineers designed into the FA24 platform but had to leave on the table for emissions, fuel economy, and longevity targets. For $4,500, owners receive a transformation that, in many ways, makes the BRZ feel like a different car altogether.

Why 60 Horsepower Matters

To understand the significance of a 60-horsepower gain, consider the stock BRZ's power-to-weight ratio. The car weighs approximately 2,800 pounds with 228 horsepower, giving it a ratio of roughly 12.3 pounds per horsepower. Adding 60 horsepower reduces that to about 9.7 pounds per horsepower, a dramatic improvement that places the car in the company of much more expensive sports cars. This translates to faster acceleration, stronger mid-range pull, and higher top-end speed on track days or spirited drives. Importantly, the gains are typically realized across the entire rev range, not just at peak power, which makes the car more responsive and fun to drive in everyday conditions.

Components of the Performance Package

The Complete Performance Package consists of five primary components, each selected and calibrated to complement the others. Below, we examine each part in detail, explaining how it contributes to the overall performance increase.

High-Performance ECU Tune

The engine control unit (ECU) tune is the brain of the entire package. Modern Subaru ECUs are sophisticated, managing everything from fuel injection timing to variable valve timing, throttle mapping, and knock control. The stock calibration is conservative, designed to protect the engine under a wide range of fuel qualities and driving conditions while meeting strict emissions standards. A high-performance ECU remap recalibrates these parameters to take full advantage of the improved airflow from the intake and exhaust systems.

Specifically, the tune optimizes fuel delivery to achieve a more favorable air-fuel ratio for power production, advances ignition timing to the edge of knock resistance, and adjusts throttle response for sharper pedal feel. Many aftermarket tunes also disable or relax certain emissions-related functions such as secondary air injection and catalyst monitoring, though it is important to note that doing so may affect legality in some jurisdictions. The result is a smoother, more powerful, and more responsive engine that delivers its newfound power without sacrificing drivability or reliability when properly executed.

Upgraded Cold Air Intake System

The factory intake system on the FA24 is designed for quiet operation and low restriction across a broad range of conditions, but it is not optimized for maximum power. An upgraded cold air intake system replaces the stock air box and intake tubing with a larger, less restrictive design that draws air from a cooler, higher-pressure zone, typically from behind the front bumper or through a dedicated scoop. Cooler air is denser, meaning it contains more oxygen molecules per unit volume, which directly supports more complete combustion and higher power output.

High-quality cold air intake kits for the BRZ FA24 use mandrel-bent aluminum or silicone tubing, along with a high-flow, oiled or dry cotton gauze filter. These filters offer lower restriction than the paper factory element while still providing adequate filtration for street and track use. The intake also often includes a heat shield to isolate the filter from engine bay heat. The combination of cooler, denser air and reduced restriction can contribute 10–15 horsepower on its own, but when combined with the ECU tune and exhaust, the gains are synergistic rather than merely additive.

High-Flow Exhaust System

An engine is fundamentally an air pump: the more efficiently it can move air in and out, the more power it can produce. While the cold air intake addresses the intake side, the high-flow exhaust system reduces back pressure on the exit side. The factory exhaust system includes restrictive catalytic converters, a muffler designed for noise compliance, and relatively small-diameter tubing. Replacing this with a high-flow system, typically featuring larger-diameter pipes (2.5 inches or 3 inches), a high-flow catalytic converter or a resonator, and a less restrictive muffler, allows exhaust gases to exit the engine more freely.

This reduction in back pressure reduces pumping losses, which directly frees up horsepower. Additionally, a well-designed exhaust system creates a scavenging effect that helps pull exhaust gases out of the cylinders, improving volumetric efficiency. The sound character changes as well, shifting from the relatively subdued factory note to a more aggressive, sporty tone that many enthusiasts find deeply satisfying. Depending on the specific design, a cat-back or turbo-back exhaust can contribute 10–20 horsepower to the overall package. For the BRZ FA24, many systems also include a larger diameter overpipe and front pipe to further reduce restriction.

Performance Spark Plugs

Spark plugs are a small but critical component in any high-performance engine build. The factory spark plugs are designed for long life and satisfactory performance under normal driving, but they may not be optimized for the increased cylinder pressures and temperatures that come with a performance tune. Performance spark plugs typically feature a smaller electrode with a fine wire tip, often made from iridium or platinum, which requires less voltage to fire and produces a stronger, more consistent spark. This improves combustion stability, especially under high-load, high-rpm conditions.

A more complete burn of the air-fuel mixture means more power from every combustion event, as well as reduced emissions and improved fuel economy under certain conditions. Performance plugs are also often designed with a different heat range, meaning they dissipate heat more or less effectively, which can help prevent pre-ignition and detonation in a tuned engine. While spark plugs alone may only contribute a few horsepower, they are an essential supporting upgrade that ensures the ECU tune and other modifications can deliver their full potential without the risk of misfire or knock.

Lightweight Flywheel

The lightweight flywheel is the one component in this package that does not directly increase peak horsepower, but it profoundly affects how the car feels and responds to throttle inputs. The flywheel stores rotational energy and smooths out power delivery from the engine. The stock flywheel is relatively heavy, designed for smooth takeoffs, quiet operation, and long clutch life. Replacing it with a lightweight unit, typically made from chromoly steel or billet aluminum, reduces rotational inertia by a significant margin, often 8–12 pounds or more.

The effect is immediately noticeable: the engine revs up and down much more quickly, making the car feel livelier and more responsive to throttle inputs. Acceleration in lower gears becomes sharper, and downshifts require less rev-matching effort. On track, a lightweight flywheel allows the driver to keep the engine in the power band more easily, as the revs rise and fall with less lag. Some street-oriented drivers worry about drivability, but a properly selected lightweight flywheel for the BRZ FA24 strikes an excellent balance between performance gains and everyday civility. Stalling on takeoff is slightly more likely for inexperienced manual drivers, but the trade-off in driving engagement is well worth it for most enthusiasts.

Benefits of the Performance Package

Beyond the headline 60-horsepower gain, the Complete Performance Package delivers a range of benefits that enhance every aspect of the driving experience. Below is a detailed breakdown of what owners can expect.

  • Substantial Horsepower and Torque Gains: The primary benefit is the 60-horsepower increase at the wheels, with corresponding torque gains that improve acceleration from low rpm through redline. This transforms the BRZ from a quick car into a genuinely fast one.
  • Improved Throttle Response: The combination of ECU tuning, reduced intake and exhaust restriction, and a lighter flywheel results in an engine that responds to throttle inputs with immediacy. The laggy, rubber-band feel of the stock system is replaced by a sharp, direct connection to the driver's right foot.
  • Enhanced Driving Experience: The BRZ has always been about the connection between driver and machine. This package deepens that connection by making the engine feel more willing, more powerful, and more engaging. Every gear, every corner, every straightaway becomes more rewarding.
  • Better Fuel Efficiency Under Certain Conditions: While it may seem counterintuitive, a properly tuned engine with improved airflow can actually achieve better fuel economy at light throttle and cruising speeds. The engine no longer has to work as hard to maintain speed, and the optimized air-fuel mixture can reduce fuel consumption in steady-state driving. However, the natural temptation to use the extra power will likely negate this benefit for most owners.
  • Increased Vehicle Value and Appeal: A well-executed performance package with professionally installed components can increase the resale value of the car, particularly if the work is documented and includes high-quality parts. For private sales, a tastefully modified car with proven power gains often attracts more buyers willing to pay a premium.
  • Cohesive, Tested System: Perhaps the greatest advantage of buying a complete package rather than individual parts is the confidence that all components have been designed to work together. There is no guesswork about compatibility, no risk of mismatched parts that fail to deliver expected results, and no need for custom fabrication or multiple tuning sessions.

Cost Analysis and Value Proposition

At $4,500, the Complete Performance Package represents a significant investment, but one that offers compelling value when compared to alternative paths to power. Consider the cost of a supercharger or turbocharger system for the FA24, which can range from $5,000 to $8,000 for the kit alone, plus installation and tuning that can add another $2,000 to $3,000. Forced induction also places greater thermal and mechanical stress on the engine, often necessitating additional supporting modifications such as oil coolers, upgraded fuel systems, and stronger internal components. The total cost for a reliable forced induction setup can easily exceed $10,000.

In contrast, the naturally aspirated approach of this package is simpler, more reliable, and less stressful on the engine. The $4,500 price tag typically includes all five components, which if purchased individually would cost significantly more. Additionally, many vendors offer the package with professional installation and a custom dyno tune, ensuring that the car leaves the shop optimized and ready to perform. When measured in dollars per horsepower, the package works out to approximately $75 per horsepower, which is competitive with or better than most other modifications.

For owners who plan to keep their BRZ for several years and drive it with enthusiasm, the cost is easily justified by the daily enjoyment and track day performance gains. For those who sell the car after a few years, the package may recoup a substantial portion of its cost in resale value, especially if the car is sold to a buyer who appreciates the upgrades.

Installation Process and Considerations

Installation of the Complete Performance Package is rated as moderately difficult, suitable for an experienced DIY mechanic with a good set of hand tools, a jack and stands, and a basic understanding of engine systems. However, several factors make professional installation a wise choice for most owners.

The ECU tune, in particular, requires specialized equipment and software. While some vendors offer handheld flash programmers that allow owners to upload a tune at home, the best results are achieved through a professional dyno tune, where the technician can adjust parameters in real time based on measured air-fuel ratios, knock activity, and power output. A custom dyno tune can extract an additional 5–10 horsepower over a generic off-the-shelf tune and, more importantly, ensures that the calibration is safe for the specific car, fuel quality, and climate conditions.

The cold air intake and exhaust system are straightforward bolt-on installations for anyone with basic mechanical skills, typically requiring 1–3 hours for each component. The lightweight flywheel installation is more involved, as it requires removing the transmission to access the flywheel and clutch assembly. This job is not overly complex but is labor-intensive, typically taking 4–6 hours for a professional mechanic. Replacing the spark plugs is a relatively simple task on the FA24, with the plugs accessible from the top of the engine.

Before undertaking the installation, owners should ensure they have the necessary tools and a clean, well-lit workspace. It is also advisable to have a torque wrench and a factory service manual on hand for reference. For those who are not comfortable working on their own car, a reputable performance shop can usually complete the entire installation in a single day, with the dyno tune adding a few hours.

It is important to acknowledge that modifying a car, especially with changes to the ECU and emissions-related components, can affect the manufacturer's warranty. Depending on the jurisdiction and the specific components, some modifications may void certain aspects of the warranty. Owners should discuss this with their dealer or a knowledgeable professional before proceeding. Additionally, removing or modifying catalytic converters may violate emissions laws in some states and countries, potentially causing a vehicle to fail annual inspections. Many high-flow exhaust systems include a high-flow catalytic converter that is legal for street use in most areas, but this should be confirmed before purchase.

Reliability and Maintenance After the Upgrade

A common concern among BRZ owners considering performance modifications is reliability. The FA24 engine is a robust, modern design with forged connecting rods and a strong block, and it has proven capable of handling significantly more power than stock. The Complete Performance Package, being naturally aspirated and conservatively tuned, is well within the engine's safety margin. The ECU tune includes knock detection and will pull timing if it detects detonation, providing a layer of protection against bad fuel or extreme conditions.

Maintenance requirements after the upgrade are similar to the stock car, though owners should be more diligent about oil changes, spark plug intervals, and air filter cleaning. The high-flow air filter may require more frequent cleaning depending on driving conditions, and the lightweight flywheel may cause slightly increased transmission noise at idle. Overall, the package does not introduce any new failure points or significant reliability risks when properly installed and tuned.

For track use, it is advisable to use high-octane fuel (93 or higher) and consider upgrading the engine oil cooler, as the increased power output will generate more heat during sustained high-rpm driving. Many owners also choose to upgrade the clutch to handle the additional torque, though the stock clutch can typically handle 60 extra horsepower for street use. If the car is driven aggressively or launched frequently, a stronger clutch is a wise investment.

Frequently Asked Questions

Can I install the package myself?

Yes, if you have mechanical experience and the proper tools. However, the ECU tune and flywheel installation are best left to professionals unless you have experience with Subaru engines and tuning software.

Will this package pass emissions testing?

It depends on your local regulations and the specific components. Many high-flow exhaust systems include a catalytic converter and are legal for street use, but some tunes may disable certain emissions monitors, causing a check engine light or a failed inspection. Check with your local authority or the package vendor.

How long does installation take?

Professional installation typically takes one full day for all components, plus a few hours for dyno tuning. DIY installation may take a weekend.

Do I need to upgrade the clutch?

For street driving, the stock clutch can usually handle 60 extra horsepower. For track use, aggressive driving, or if you plan to add more power later, a stronger clutch is recommended.

Can I add a supercharger later?

Yes, but some components of this package (especially the intake and exhaust) are still compatible with forced induction. The ECU tune will need to be replaced with a supercharger-specific calibration. Many owners start with a naturally aspirated package and add forced induction later.

Conclusion: Is the Complete Performance Package Worth It?

The Complete Performance Package for the Subaru BRZ FA24, priced at $4,500 for a verified 60-horsepower gain, is one of the most compelling value propositions in the aftermarket for this platform. It delivers a holistic transformation of the driving experience, addressing airflow, combustion, engine management, and rotational mass in a coordinated, tested system. The horsepower increase is substantial enough to change the character of the car, making it genuinely quick without the complexity and expense of forced induction.

For owners who love their BRZ's handling and chassis but wish for more power, this package is a near-ideal solution. It preserves the naturally aspirated character many drivers prefer, enhances throttle response and acceleration, and adds a level of engagement that makes every drive more rewarding. The cost is reasonable for the gains delivered, and with professional installation, the package is reliable and well-suited for both street and track use.

Ultimately, the decision comes down to what you want from your BRZ. If the stock power level leaves you wanting more, and you value a cohesive, turnkey solution over piecing together parts from different sources, the Complete Performance Package is a smart, effective, and exciting choice.

For further reading on the FA24 engine platform and aftermarket upgrades, check out resources from Subaru's official BRZ page, enthusiast communities such as FT86 Club, and performance parts retailers like Cobb Tuning for ECU solutions and component upgrades. Always consult with a professional tuner familiar with the FA24 platform to ensure your specific setup is optimized for safety and performance.