Description
These springs offer a big gain for the M57 with almost 100% seat pressure increase over stock springs.
Upgraded valve springs for the BMW M57 and are not simply OEM springs from another application that have been repackaged.
Stock springs are very weak and valve float starts around the 420hp mark on M57.
Stock Valve Spring Seat pressure is 34lbs and 55lbs Open.
These springs are 66lbs seat pressure and 96lbs Open.