Aftermarket tuning for the Toyota GR86 and Subaru BRZ has been heating up since their latest generation launch. Leading the charge is HKS, one of Japan’s most respected tuning firms, which has introduced a revolutionary new piston aimed at enhancing the performance of these popular models.
Piston Innovation for High-Performance Tuning
The challenge with modern engines is balancing power and emissions. HKS has stepped up to this task with the creation of next-generation strengthened pistons for the FA24 engine shared by the GR86 and BRZ. These pistons improve combustion efficiency while maintaining durability under high stress.
The new design incorporates advanced “Tumble Flow” technology. Tumble flow refers to the way the air-fuel mixture moves within the combustion chamber. By optimizing this movement, the pistons ensure more complete fuel combustion, resulting in increased power and fewer emissions. This innovation is perfectly suited for turbocharged setups that demand higher performance.
Why Strengthened Pistons Matter
Stock pistons, while sufficient for everyday driving, are often the weak point when tuning for more power. Increased boost levels or aggressive timing can cause standard pistons to fail. This is where HKS’s solution shines.
The pistons are manufactured using forged aluminum, known for its exceptional strength-to-weight ratio. Combining this with precise engineering ensures the pistons can withstand extreme pressures generated by turbocharged or supercharged setups.
Key Features of HKS Strengthened Pistons:
- Improved Cooling Channels: Keeps temperatures in check during high-performance operation.
- Enhanced Durability: Ideal for engines running at higher power levels.
- Optimized Combustion Efficiency: Makes better use of fuel, providing both power and environmental benefits.
Compatibility with GR86 and BRZ Owners’ Needs
HKS didn’t just stop at the pistons. Their engineers took into consideration the needs of enthusiasts who modify their cars for track use or daily performance driving. These pistons provide a reliable foundation for anyone installing turbo kits or upgrading their exhaust systems, air intakes, and ECUs.
Future Implications for Tuning the FA24 Engine
The FA24 platform, with its naturally aspirated 2.4L engine, has already proven to be a favorite among tuners. While some enthusiasts prefer to keep their power builds naturally aspirated, others have pursued forced induction setups. The durability improvements provided by HKS’s pistons make forced induction more accessible and reliable, opening the door for higher horsepower figures—without risking engine failure.
For those serious about pushing the limits of their GR86 or BRZ, integrating these pistons into their build is a smart long-term investment. Whether you’re aiming for weekend track domination or spirited backroad drives, the HKS upgrade guarantees performance without compromise.
FA24 Technical Specifications (Stock Configuration)
| Specification | Value |
|---|---|
| Engine Displacement | 2.4L Naturally Aspirated Flat-4 |
| Compression Ratio | 12.5:1 |
| Peak Horsepower | 228 hp |
| Peak Torque | 184 lb-ft |
The addition of HKS’s advanced pistons can dramatically alter these figures depending on the tuning configuration.
Visualizing the High-Performance Build
HKS’s cutting-edge pistons set a new benchmark for what’s possible in modifying the GR86 and BRZ. With this innovation, enthusiasts can unleash the full potential of their FA24 engines.
