Ferrea Valve Spring Kit KT4026 for the BMW N54 are engineered to overcome the most common performance-limiting issues: valve binding

All Pro-Series products are supplied with a nickel coating or optional with a burnished protecting against corrosion in the long term

Maximum Differential Fuel Pressure – 9

Air-to-water intercooling is the future for forced induction vehicles

Please note that these 148 mm connecting rods are designed to fit BMW B58 engines found in the following applications:

BMW M20 Forged Rod & Piston Kit Connecting Rods:Carrillo - 135 mm Ferrea Valve Spring Kit KT4026Reinforce your BMW M20B25 or M20B27 engine with 5150 AutoSports premium M20 Forged Rod & Piston Combo. Built for exceptional strength and performance, this setup features CP forged pistons paired with your choice of Manley or Carrillo rods, making it the ideal solution for high powered street and race applications. Engineered to surpass OEM limits, this combo delivers reliability and precision for everything from spirited daily driving to extreme high