STK Performance Racing Dual Valve Spring Kit – Opel 8v

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.