The Mazda FE3 16-valve engine is a solid platform for naturally aspirated or turbocharged performance builds. Known for its strong bottom end and high-flow cylinder head, the FE3 responds incredibly well to tuning. However, pushing it beyond factory limits demands upgrades to the valvetrain—starting with the valve springs.
STK Performance offers a high-quality dual valve spring upgrade specifically developed for the FE3 16V, designed to handle the stress of high-RPM, high-lift camshaft, and forced induction applications with confidence and reliability.
Why Choose STK Performance Dual Valve Springs for the FE3?
The stock FE3 single valve springs are not designed to handle extended high RPM use, aggressive camshaft profiles, or high boost levels. STK Performance’s dual spring kit eliminates these weak points, offering:
- Superior Valve Control at High RPM
- Boost-Ready Performance
- Compatibility with High-Lift Camshafts
- Improved Harmonic Damping
- Race-Grade Durability
By combining inner and outer springs, STK’s dual spring design minimizes the chance of valve float or valve bounce, which can lead to misfires, loss of power, or even engine failure under load.
Materials & Engineering Excellence
STK Performance sources only premium materials and applies advanced manufacturing techniques to ensure longevity and precision:
- High-Tensile Chrome Silicon Steel – Delivers excellent fatigue resistance and heat stability.
- Dual Spring Construction – Outer and inner springs tuned for damping resonance and maintaining valve seat pressure at all engine speeds.
- Shot Peened Finish – Enhances fatigue life by inducing compressive stress on the surface.
- Heat Treated & Stress-Relieved – Ensures dimensional consistency and long-term spring integrity.
These are not generic springs—they’re purpose-built for the FE3 head layout, retaining OEM fitment while dramatically improving performance characteristics.
Benefits of STK Performance Dual Valve Springs for the Mazda FE3 16V
| Feature | Benefit |
| Dual spring design | Prevents valve float and maintains timing precision at high RPM |
| High-lift cam compatibility | Supports aggressive camshaft profiles with increased lift and duration |
| Boost-capable spring pressure | Ideal for turbocharged/nitrous builds making high cylinder pressures |
| Motorsport-grade durability | Reliable under track, drift, or rally conditions |
Ideal Applications
- Turbocharged & Supercharged Builds
- Naturally Aspirated High-RPM Engines
- Track Cars, Rally, Drift & Time Attack
- Street Builds Requiring Extended Reliability
Why STK Performance?
STK Performance is known for delivering race-ready valvetrain components engineered for real-world use. Their FE3 dual valve spring kits are the result of years of motorsport experience and testing across different platforms. With a commitment to quality, fitment accuracy, and reliability, STK is the go-to brand for enthusiasts and professionals building reliable high-performance engines.
Conclusion
For builders looking to unlock the full performance potential of the Mazda FE3 16V, STK Performance’s dual valve spring upgrade is a must-have. It ensures rock-solid valve control at high RPM, prevents valve float in forced induction applications, and provides the durability needed for track and street abuse.
Don’t let your factory springs limit your build—upgrade with STK Performance and rev with confidence.