CAT Cams Camshaft, BMW M20

Please note: All camshafts must be installed by a professional engine builder, using the provided camshaft specification sheet. The builder is responsible for verifying piston-to-valve clearance and setting engine timing according to the cam card specifications, not the factory settings.

Transform your BMW M20 engine with a CAT Cams camshaft for precision performance and enhanced driving dynamics. The iconic M20 engine, known for powering models such as the BMW E12, E21, E28, and E30, delivers solid performance for both enthusiasts and racers. CAT Cams offers camshaft profiles tailored for various driving styles, ensuring you find the ideal solution for your needs—whether for street driving, rally racing, or competitive track use.

CAT Cams provides an array of meticulously engineered camshaft grinds. For street car owners, milder profiles enhance everyday driving with smooth power delivery. For those pushing their M20 engines on the track or in rally stages, more aggressive cam profiles unlock faster throttle response and extend the engine’s power band.

Designed for durability and consistency, CAT Cams camshafts help your BMW M20 deliver peak performance at every RPM. Whether you're cruising through urban streets or tackling technical track sections, these camshafts ensure your engine responds with precision and power every time.

Built on a foundation of expertise, CAT Cams products are trusted by performance enthusiasts worldwide. Optimize your BMW M20 engine with a reliable, high-performance camshaft that brings out the best in your build.

Choosing the Right Cam for your Application:

For optimal performance and reliability, 5150 strongly advises replacing your valve springs with your camshafts, even with mild camshaft upgrades. This essential step acts as a preventive measure against potential piston-to-valve contact during instances of over-revving or mis-shifts. By taking this proactive approach, we prioritize your engine's well-being and ensure that you experience the highest levels of performance without compromising on reliability.

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