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11 34 Valves with Springs M54

WARNING: This page does not describe the selected car, but rather 38 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
VALVES WITH SPRINGS M54 SPECIFICATIONS

The following valve versions are available for repairs in addition to the standard valves:
Stem dia. inlet stage 1 mm R 1 -0.025-0.040
Stem dia. exhaust stage 1 mm R 1 -0.040-0.055
Overmeasure at valve plate mm 0.2
Identification on stem   R1
Stem dia. inlet stage 2 mm 6.2 -0.025-0.040
Stem dia. exhaust stage 2 mm 6.2 -0.040-0.055
Overmeasure at valve plate mm 0.4
Identification on stem   R2