The Ford ST150, known for its rev-happy Duratec 2.0 engine, has become a popular platform for tuning and motorsport applications. Whether naturally aspirated or boosted, increased performance demands more from the valvetrain – particularly the valve springs. STK Performance offers a dedicated high-performance valve spring kit engineered specifically for the ST150, delivering durability, control, and value.
Purpose of Performance Valve Springs
As engine performance increases through higher lift camshafts, increased RPM, or boost pressure, the factory valve springs can quickly become a limitation. Valve float, poor valve control, and inconsistent sealing are common problems. Upgrading to performance valve springs ensures:
- Stable valve motion at high RPMs
- Resistance to coil bind with high-lift camshafts
- Improved sealing under boost
- Prevention of valve float and bounce
Material & Engineering
STK Performance valve springs are manufactured using premium Chrome-Silicon alloy steel, a material selected for its exceptional tensile strength, fatigue resistance, and thermal stability. This ensures the springs maintain performance even under extreme cylinder pressures and prolonged high-RPM operation.
Key features include:
- High-tensile Chrome-Silicon construction
- Optimised spring rates for aggressive camshafts
- Precision wound for consistent seat and open pressures
- Durable surface finish for extended fatigue life
In addition, STK kits often include compatible hardened retainers , ensuring a complete and reliable upgrade with perfect geometry.
Why Choose STK Performance?
STK Performance is known for its specialised valvetrain solutions tailored for motorsport and tuned street applications. Here’s why their valve spring kits for the ST150 stand out:
- Purpose-Built: Designed specifically for the Ford Duratec 2.0 engine – no guesswork in compatibility.
- Proven Performance: Engineered to handle high boost and revs up to 8500 RPM.
- Affordability: High-end materials and performance without the high-end price tag.
- Local Support: Readily available with regional knowledge, support, and fast delivery.
Ideal Applications
STK Performance valve springs are ideal for:
- Turbocharged or supercharged ST150 builds
- Naturally aspirated engines with high-lift camshafts
- Track-day or race-prepped Duratec engines
- Reliable, daily-driven performance vehicles
Conclusion
Upgrading the valve springs in your Ford ST150 is a critical step in building a reliable, high-performance engine. STK Performance offers a trusted, high-quality solution engineered for demanding use. With excellent materials, tailored fitment, and proven high-RPM capability, the STK valve spring kit is the smart choice for tuners, racers, and enthusiasts alike.
For more information or to order your kit, contact STK Performance