STK Performance Racing Valve Spring Kit BMW M20

Product Overview

High-performance dual valve spring kit for BMW M20 engines. Manufactured from premium Chrome Silicon steel with Chromoly retainers. Designed for reliable high-RPM operation in naturally aspirated applications.

Engine Applications

Fits: E21 3 Series · E28 5 Series · E30 3 Series (320i / 323i / 325e / 325i / 325is / 325iX) · E34 520i / 525i · Z1

Engine codes: M20B20, M20B23, M20B25, M20B27 (Eta), M20B27 Super Eta

What's Included

• 12 × Inner Valve Springs
• 12 × Outer Valve Springs
• 12 × 7mm Chromoly Retainers

Technical Specifications

Seating Pressure 37mm 95lbs Full Lift Pressure = 240lbs

Material Specifications

Valve Springs: Premium Chrome Silicon Steel Retainers: 4130 Chromoly Steel - 7mm valve stem Performance Rating: 8500rpm capability

Application

Designed for BMW M20 engines.

Installation Notes

Professional installation recommended. Verify spring heights and clearances.