B58 PCV Diaphragm Replacement Kit - Performance M B58-PCV-DK

Direct-fit replacement for the B58 engine’s PCV diaphragm - no valve cover swap needed. Fits F30, F32, G20 and G22 B58 models.

• Includes diaphragm, cap, gasket and fasteners - full kit for a clean DIY repair
• Fixes oil leaks, rough idle and related check engine lights (e.g. 11D2, 11D3)
• Heat-resistant cap resists cracking during removal - unlike brittle OEM units
• Proven on fast-road and track-day B58s where reliability matters more than showroom shine