Product Overview
High-performance dual valve spring kit manufactured from premium Chrome Silicon. Engineered for reliable high-RPM operation and motorsport applications. Eliminates valve float and maintains precise valve timing under extreme conditions.
Engine Applications
Fits: Kadett · Astra · Vectra · Kadett Superboss / Boss (20SEH)
Engine codes: 20NE, C20NE, 20SE, 20SEH, C20SE
What’s Included
- 8 × Inner Valve Springs
- 8 × Outer Valve Springs
- 8 × Chromoly Retainers
Technical Specifications
Seating Pressure @ 34mm = 90lbs
Full Lift Pressure = 200lbs
Material Specifications
Valve Springs: Premium Chrome Silicon (CrSi) – Shot peened and heat treated for superior fatigue resistance
Retainers: 4130 Chromoly – Reduces inertia while ensuring long-term durability
Performance Rating: 8500 RPM capability
Lift Capacity: Up to 12mm camshaft lift
Application
Designed for Opel 8v applications. Compatible with high-lift camshafts and performance builds.
Installation Notes
Professional installation recommended. Verify spring heights and valve travel to avoid coil bind.
