BMW M20 Valve Springs by SuperTech

Supertech’s high-performance valve springs for BMW M20 engines (including M20B20, M20B23, M20B25, and M20B27) are designed for serious engine builders and high-performance enthusiasts who demand extreme durability at high RPM.

Made from Superclean Chrome Silicon Vanadium Steel alloy, these valve springs deliver top-tier strength, exceptional structural memory, and extended longevity, even in intense racing conditions. Engineered with computer-aided design, they minimize wire stress and expertly manage valve harmonics, optimizing high-RPM performance and reliability.

The set includes CNC-machined titanium retainers crafted from military-certified alloy, ensuring precise fitment and reduced valvetrain weight for faster response. Built to withstand the demands of high-performance BMW engines, Supertech’s valve springs and retainers offer unmatched reliability and durability, making them the premier choice for engine builders focused on maximizing BMW M20 performance.

Installation requires the expertise of an engine builder.

• Seat Pressure: 90 lbs

BMW M20B20 Applications:

BMW 3 Series

1977-1982     E21     320 / 326
1982-1994     E30     320i

BMW 5 Series

1977-1981     E12     520 / 526
1981-1987     E28     520i

BMW 7 Series

1981-1987     E23     720i

BMW M20B23 Applications:

BMW 3 Series

1977-1982     E21     323i
1982-1994     E30     323i

BMW M20B25 Applications:

BMW 3 Series

1985-1993     E30     325i / 325is / 325ix

BMW 5 Series

1987-1990     E34     525i

BMW M20B27 Applications:

BMW 3 Series

1982-1987     E30     325e / 325es [North America]

BMW 5 Series

1982-1987     E28     525e / 528e