BMW M50 / M52 / S50 / S52 Valve Spring Kit by Ferrea

Upgrade your BMW M50, M52, S50, or S52 engine with Ferrea high-performance valve springs, engineered to address three critical issues that can hinder engine performance: binding, breakage, and valve float.

Combat Common Engine Performance Issues:

• Binding: Prevents valves from opening or closing correctly, risking severe engine damage.
• Breakage: Can lead to valves dropping into the combustion chamber, resulting in catastrophic failures.
• Valve Float: Often caused by insufficient spring rates, valve float leads to power loss and combustion leaks at high RPMs.

Superior Engineering for Maximum Performance

Ferrea valve springs are meticulously heat-treated and stress-relieved, providing stability for high-lift and high-RPM applications while minimizing load loss. Coupled with precision CNC-machined retainers, these springs offer unparalleled strength and stability to meet the rigorous demands of racing.

To ensure optimal performance, Ferrea Spring Seat Locators are constructed from robust 4140 chromoly alloy, maintaining precise tolerances and a flat, parallel spring pad. The hard Nitrided surface treatment enhances toughness and wear resistance, making these components an essential upgrade for your high-performance setup.

Enhance Your Racing Engine's Capabilities

For any serious racing enthusiast, upgrading to high-performance valve springs is crucial. Stock valve springs often struggle to cope with increased lift and RPMs, resulting in valve float and reduced power output. Ferrea’s high-strength chromoly steel valve springs provide increased spring pressure at higher speeds, significantly improving engine response, power, and reliability.

By addressing common valve spring challenges such as binding, breakage, and valve float, Ferrea's high-quality valve springs ensure proper valve operation, maximize engine power, and drastically reduce the risk of engine failure.

Installation requires the expertise of an engine builder.

BMW M50 Applications:

3 Series

1990-1995     E36     320i / 325i / 325is
1994-1996     E35/E36     318ti

5 Series

1990-1996     E34     520i / 525i
1991-1996     E34 Touring     520i / 525i

Z Series

1995     E36/E37     Z3 2.0i / 2.5i

BMW M52 Applications:

3 Series

1994-1999     E36     320i / 323i / 323is / 328i / 328is
1997-2000     E35/E36     318ti / 323ti

5 Series

1996-1998     E39     520i / 523i / 528i

7 Series

1996-1998     E38     728i / 728iL

Z Series

1996-1999     E36/E37/E38     Z3 2.0i / 2.2i / 2.8i

BMW S50 US Applications:

3 Series

1994-1995     E36     M3

BMW S52 Applications:

3 Series

1996-1999     E36     M3

Z Series

1998-2000     E36/E37/E38     Z3M