Stiffer valve springs N47 B47 • BMW 125d 320d 23d 25d & other |2008 to 2020|

Performance valve springs for BMW N47 and B47 4-cylinder diesel engines. Fits to:

• BMW 116d 118d 120d 123d 125d  (E87; F20 years 2008 - 2019)
• BMW 218d 220d 225d  (F22 years 2008 - 2019)
• BMW 318d 320d (E90 years 2008 - 2012)
• BMW 316d 318d 320d 325d (F30 years 2012 - 2019)
• BMW 418d 420d 425d (F32 years 2012 - 2016)
• BMW 520d 525d (F10 years 2012 - 2020)
• BMW X1 X3 18d 20d 23d 25d (years 2009 - 2016)
• Other BMW cars with N47 N47N N47S B47 diesel engines
  

Valve springs have more valve seat pressure than stock BMW springs (pressure increase of 32% when valve closed, 40% valve open)

They very effectively solve valve float problem when putting high boost to these engines but do not damage the engine or camshafts. Allows to run boost levels up to approximately 4.0 bar.