BMW B48 Valve Spring Kit by Ferrea

When it comes to enhancing engine performance in BMW, Toyota, and Mini B48 engines, Ferrea valve springs stand out as one of the best industry offerings. Designed to address three critical issues that can jeopardize engine efficiency—binding, breakage, and valve float—these springs are engineered for serious enthusiasts and racers.

Combatting Binding, Breakage, and Valve Float
Binding can lead to valves that fail to open or close properly, risking severe engine damage. Breakage poses an even greater threat, potentially causing valves to drop into the combustion chamber and resulting in catastrophic engine failures. Valve float, often caused by insufficient spring rates, can result in significant power loss and combustion leaks at high RPMs. Ferrea valve springs are meticulously heat-treated and stress-relieved, ensuring stability for high-lift and high-RPM applications while minimizing load loss.

Superior Strength and Stability
To further enhance performance, Ferrea provides precision CNC-machined retainers that offer unmatched strength and stability, capable of withstanding the rigorous demands of racing.

Ferrea Spring Seat Locators are crafted from robust 4140 chromoly alloy, ensuring precise tolerances and a flat, parallel spring pad. The hard nitrided surface treatment improves toughness and wear resistance, making these components an essential addition to any high-performance setup.

Upgrade for Maximum Performance
Upgrading to high-performance valve springs is crucial for any serious racing engine. Stock valve springs often falter under increased lift and RPMs, leading to valve float and decreased power output. Constructed from high-strength materials like chromoly steel, Ferrea's valve springs offer increased spring pressure at higher speeds, enhancing engine response, power, and overall reliability.

By addressing common challenges such as binding, breakage, and valve float, Ferrea’s high-quality valve springs ensure optimal valve operation, maximizing engine power while significantly reducing the risk of failure.

Installation requires the expertise of an engine builder.

BMW B48 Applications:

1 Series

2016-2019    F20    120i / 125i
2019-2023     F40     118i / 120i / 128ti / 135i / M135i
2024-Present     F70     120 / M135i 

2 Series

2014-2021     F22/F23     218i / 220i / 230i
2014-2017     F45     220 / 225i
2021-Present     G42     218i / 220i / 230i
2021-Present     U06     223i
2020-2024     F44     218i / 220i / 228i / M235i
2025-Present     F74     M235

3 Series

2015-2019     F30/F31/F34     320i / 330i / 330e
2018-Present     G20/G21     318i / 320i / 330i / 330e

4 Series

2016-2019    F32/F33/F36    420i / 430i
2020-Present     G22/G23/G26     420i / 430i / 430e

5 Series

2017-Present     G30/G31     520i / 530i / 530e

6 Series

2017-Present     G32     630i

7 Series

2015-2022     G11/G12     730i / 730Li / 740e / 740Le

X1 Series

2015-2022     F48     sDrive18i / sDrive20i / xDrive20i / 25i / xDrive25i / 28i
2022-Present     U11     sDrive18i / xDrive20i / xDrive28i / M35i

X2 Series

2018-2023     F39     sDrive18i / sDrive20i / xDrive20i / 25i / xDrive25i / 28i / M35i
2023-Present     U10     xDrive28i / M35i

X3 Series

2017-2024     G01     sDrive20i / xDrive20i / xDrive30i / xDrive30e
2025-Present     G45     xDrive20e / xDrive30e

X4 Series

2018-Present     G02     xDrive20i / xDrive30i

X5 Series

2018-Present     G05     xDrive25i / sDrive25i

Z Series

2018-Present     G29     Z4 sDrive20i / sDrive30i

Toyota B48 Applications:

A90 / A91 Supra

2019-Present     J29/DB82/DB22 Supra
2020-Present     GR Supra 2.0  

MINI B48 Applications:

MINI Hatch [F55/F56/F57]

2014-Present     Cooper S
2015-Present     John Cooper Works (JCW)

MINI Clubman [F54]

2015-Present     Cooper S
2016-Present     John Cooper Works (JCW)

MINI Convertible [F57]

2016-Present     Cooper S
2016-Present     John Cooper Works (JCW)