5150 AutoSport Pro-Xtreme Valve Springs for BMW M20 engines: M20B20, M20B23, M20B25, and M20B27.
Maximize your engine’s potential with 5150 AutoSport Pro-Xtreme Valve Springs, designed for BMW M20B23, M20B25, and M20B27 engines. Whether you're building for high-revving street performance or all-out racing, these valve springs are built to handle engine speeds of up to 11,000 RPM with confidence.
Designed for Peak RPM Performance
Perfect for high-lift cams and aggressive tunes, 5150 AutoSport Pro-Xtreme Valve Springs deliver flawless valve control, preventing float even at extreme RPMs.
Precision-Engineered for High-Performance Builds
These springs are carefully designed to handle the demands of track-focused applications, forced induction setups, and naturally aspirated builds tuned for high RPMs. They offer consistent performance, ensuring your engine runs smoothly under extreme conditions, whether you're racing on the track or pushing your limits on the street.
Key Features:
- Capable of supporting engine speeds up to 11,000 RPM
- Tested and proven to handle 9,500 RPM in our E36 M3 "Bully" build
- Ideal for use with high-lift camshafts and aggressive tuning
- Engineered for BMW M20 engines
Note that installation requires the expertise of an engine builder.
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