BMW S14 Valves by SuperTech

The SuperTech High-Performance Valve Kit for the BMW S14 engine is designed for enthusiasts and engine builders seeking superior durability, reliability, and power gains. Engineered specifically for the high-revving S14 4-cylinder, this kit is ideal for race, track, and performance street applications, ensuring maximum airflow and efficiency.

SuperTech’s precision-crafted valves offer exceptional strength and heat resistance, making them a trusted choice for demanding performance builds. With an optimized design to enhance airflow, these valves contribute to improved horsepower, throttle response, and overall engine efficiency—critical for extracting the full potential of the legendary BMW S14.

Manufactured from premium materials and built to exact specifications, SuperTech valves ensure perfect fitment and long-term reliability in high-performance applications. Whether you're rebuilding an E30 M3 engine for competition or enhancing its street performance, this kit delivers proven power gains and consistent results.

Key Features:

• Designed for BMW S14 Engines – Precision-engineered for E30 M3 applications.
• Optimized Airflow & Power – Increases engine efficiency and performance.
• Durable & Heat Resistant – Built to withstand extreme temperatures and high RPM use.
• Ideal for Racing & Street Performance – Suitable for high-output applications.
• Proven by Engine Builders – Trusted SuperTech quality for performance enthusiasts.

Take your BMW S14 engine to the next level with SuperTech’s high-performance valve kit—designed to deliver maximum reliability and power where it matters most.

Standard Size is 37 mm Intake / 32 mm Exhaust

Longer length valves are for shim-under-bucket applications. If you aren't sure which valves you need for your application, CONSULT WITH A PROFESSIONAL ENGINE BUILDER.

Kit Contents: 

• (8) Intake Valves 
• (8) Exhaust Valves 

BMW S14 Applications:

BMW S14B20

1989-1991      E30     320is [Portugal and Italy]

BMW S14B23

1986-1991      E30     M3
1986-1987      E30     M3 Evo I
1988      E30     M3 Evo II

BMW S14B25

1990      E30     M3 Sport Evo (Evo III)