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.
Engine Applications
Fits: Kadett / Astra GSi · Calibra · Vectra · Calibra Turbo (C20LET)
Engine codes: 20XE, C20XE, C20LET, X20XEV, X20XER, C20SEL
What’s Included
C20xe
- 16 × Inner Valve Springs
- 16 × Outer Valve Springs
- 16 × Chromoly Retainers 7mm
Technical Specifications
Seating Pressure @ 34mm = 90lbs
Full Lift = 200lbs
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.
