BMW N55 / S55 Valve Spring Kit by Ferrea

For BMW N55 and S55 owners seeking high performance valve springs, Ferrea offers an expertly engineered solution designed to eliminate common issues like binding, breakage, and valve float—critical factors that can compromise engine performance.

Ferrea valve springs are specifically crafted for high-lift and high-RPM applications, providing enhanced stability and reducing load loss. Ferrea springs undergo meticulous heat treatment and stress relief to ensure long-lasting performance, making them ideal for serious racers and high-performance builds. Engine binding, breakage, and valve float are common issues that can lead to severe engine damage, but Ferrea’s high-quality springs are engineered to combat these challenges effectively.

Engine binding occurs when valves fail to open or close properly, risking severe damage. Valve breakage can lead to catastrophic failures if a valve drops into the combustion chamber, while valve float—often caused by inadequate spring rates—results in power loss and combustion leaks at high RPMs. Upgrading to Ferrea valve springs ensures these issues are eliminated, providing consistent power and enhanced reliability.

Ferrea also offers precision CNC-machined retainers designed for optimal strength and stability, ensuring they can handle the rigors of high-performance racing. Paired with Ferrea Spring Seat Locators, which are made from robust 4140 chromoly alloy with a hard Nitrided surface treatment, these springs are ready to withstand the toughest demands. The precision and toughness of these components mean a flat, parallel spring pad for precise operation.

For BMW N55 and S55 engines, upgrading to Ferrea high-performance valve springs is essential for maximizing engine output and reliability. These springs offer increased spring pressure at high RPMs, improving engine response, power, and durability. Ensure your high-performance BMW engine is ready for the track or street by choosing Ferrea’s valve spring solution to combat binding, breakage, and valve float for optimal power delivery and engine longevity.

Installation requires the expertise of an engine builder.

BMW N55 Applications:

1 Series

2010-2013     E82/E88     135i
2012-2016     F20/F21     M135i

2 Series

2014-2016     F22/F23     M235i
2016-2018     F87     M2

3 Series

2010-2015     E90/E91/E92/E93     335i
2012-2015     F30/F31/F34     335i
2015-2016     F30/F31     340i

4 Series

2013-2016     F32/F33/F36     435i
2016     F32/F33/F36     440i

5 Series

2010-2016     F10/F11     535i
2010-2017     F07     535i GT

6 Series

2011-2018     F12/F13/F06     640i Gran Coupe

7 Series

2012-2015     F01/F02     740i / 740Li

X1 Series

2013-2015     E84     X1 xDrive35i

X3 Series

2011-2017     F25     X3 xDrive35i

X4 Series

2014-2017     F26     X4 xDrive35i
2016-2017     F26     X4 M40i

X5 Series

2011-2018     E70/F15     X5 xDrive35i

X6 Series

2011-2019     E71/F16     X6 xDrive35i

ALPINA N55 Applications:

B3 Series

2013-2018     F30/F31     B3 Bi-Turbo

B4 Series

2014-2019     F32/F33     B4 Bi-Turbo

B5 Series

2010-2016     F10     B5 Bi-Turbo

B6 Series

2011-2018     F12/F13/F06     B6 Bi-Turbo Gran Coupe

BMW S55 Applications:

2 Series

2018-2020     F87     M2 Competition

3 Series

2012-2018     F80     M3

4 Series

2014-2020     F82     M4
2014-2020     F83     M4