Precision Engineering for Ultimate Reliability and Performance
When it comes to enhancing the performance and reliability of your VW Polo CLS or CLP engine, upgrading the valve train is one of the most critical steps. STK Performance offers high-quality valve spring kits specifically developed for the VW Polo 1.4L 16V and 1.6L 16V engines (engine codes CLS and CLP). These engines, popular across various markets for their efficiency and robustness, greatly benefit from a more durable and performance-oriented valve spring solution.
STK Performance Valve Spring Kits – Designed for Durability & Power
STK Performance has engineered these dual valve spring kits with motorsport and high-performance applications in mind. Whether you’re tuning for more aggressive camshafts, running higher RPM, or improving engine reliability for daily spirited driving, these kits deliver outstanding benefits:
Key Features:
✅ Single Valve Spring Design
The single spring setup increases seat pressure and control over valve motion at high RPMs, reducing valve float and bounce, essential for engines running aggressive cam profiles or higher rev limits.
✅ High-Grade Spring Material
Manufactured using premium heat-treated chrome-silicon steel , these valve springs provide superior fatigue resistance and longevity under high-stress environments.
✅ Precision Engineering & Testing
Each spring undergoes load testing, coil bind clearance verification, and harmonics optimization. STK ensures every kit meets strict tolerances for motorsport use.
✅ Direct Fit for CLS / CLP Cylinder Heads
No machining required. These kits are designed as a drop-in solution for the Polo 1.4 and 1.6 16v valve cylinder heads, making installation efficient and straightforward. However valve spring heights and travel must be checked to avoid coil bind.
Benefits of Upgrading to STK Valve Springs:
- Supports High-Performance Camshafts
Prevents valve float at high RPM with aftermarket cam profiles. - Improves Engine Longevity
Reduces wear on lifters, valves, and camshafts by maintaining accurate valve timing under stress. - Enhanced RPM Stability
Ideal for builds that push past OEM rev limits or see sustained high-RPM use. - Increased Power Potential
Maximizes the performance gains from other engine upgrades like camshafts, pistons, or ported heads.
Why Choose STK Performance?
STK Performance is recognized for its race-proven engineering, high manufacturing standards, and application-specific design. Trusted by engine builders across multiple platforms, STK provides the confidence you need whether you’re building for fast road, track day, or full competition use.
Conclusion
The STK Performance Valve Spring Kit for VW Polo CLS and CLP engines is more than just an upgrade—it’s an essential component for serious engine builds. Whether you’re looking for reliability at higher RPM or unlocking the full potential of your naturally aspirated or turbocharged 16 valve Polo, STK delivers the solution.
STK Performance – Precision. Strength. Speed.