Each valve undergoes a 48-hour heat treatment and stress-relieving process to ensure optimal molecular integrity

There is a ledge on the bottom of the fuel pump sleeve which stops the pump from sliding too far down

1mm  Valve Lift  Application  255° Intake / 255° Exhaust   9

and AFR table correction

With optimized 280°/288° duration and high-lift specs

BMW S58 Lifter Shim Set by Ferrea SC7312 Each valve undergoes a 48-hourThe Ferrea Racing Lifter Shim Set is designed to optimize the performance of BMW S58 engines by improving valvetrain stability. Installed beneath the stock hydraulic lifters, these precision shims reduce lifter travel distance, preventing valve float and enhancing power delivery under demanding conditions. Prevent Valve Float at High RPMs Whether you're running high boost setups or pushing high RPMs, valve float can become a serious issue. This occurs