Product Overview
High-performance dual valve spring kit manufactured from premium Chrome Silicon steel. Purpose-built for motorsport and high-performance applications. Eliminates valve float and coil bind, rated up to 8500rpm with capacity for aggressive camshaft profiles up to 14mm lift.
What's Included
- 16 × Inner Valve Springs
- 16 × Outer Valve Springs
- 16 × 7mm Chromoly Retainers
- 8 × Inlet Valves (21-4N Stainless Steel)
- 8 × Exhaust Valves (21-4N Stainless Steel)
Material Specifications
Valve Springs: Premium Chrome Silicon Steel (CrSi) - Shot peened and heat treated for superior fatigue resistance and heat stability
Retainers: 4130 Chromoly Steel - Lightweight with exceptional strength, reduces inertia for improved valvetrain stability
Performance Rating: 8500+ RPM capability
Lift Capacity: Up to 14mm camshaft lift
Key Benefits
- Superior valve control at high RPM - eliminates valve float and bounce
- Protection against coil bind under extreme conditions
- Compatible with aggressive camshaft profiles
- Track-proven reliability in motorsport applications
- Enhanced durability for naturally aspirated and turbocharged setups
Installation Notes
Professional installation recommended. Correct spring heights and valve travel must be verified to avoid coil bind. For camshaft installations, always check piston-to-valve clearance and verify spring installed height. Use high-zinc break-in oil on first start.
This component forms part of the valve train system and must be selected to suit the intended engine configuration, RPM range, and camshaft design.

