Upgrade Your M104 Breather System
Improve crankcase ventilation and reliability with these precision CNC-machined billet breather adapters for Mercedes M104 engines.
Designed for performance builds, these adapters allow easy integration of AN fittings for catch cans or custom breather systems – helping reduce pressure buildup and improve engine efficiency under load.
Built from high-quality T6 aluminum for strength and durability, with a clean OEM+ fit and finish.
Perfect for turbo builds, drifting, and high-performance street or track use.
M104 Billet Aluminum Valve Cover Breather Adapters
Precision CNC-milled T6 aluminum adapters for the M104 valve cover. Designed with M22x1.5 threads to fit AN12/10 fittings, ideal for performance breather systems and oil catch cans.
🔹 T6 Aluminum – Strong, lightweight, and corrosion-resistant
🔹 M22x1.5 Threads – Secure AN12/10 connection
🔹 CNC-Milled – Perfect M104 cam cover fit
🔹 Use Loctite 638 for secure installation
Upgrade your M104 with premium-quality components built for performance!
2 Pcs 34€
AN connections not included
A small amount of grinding may be necessary to ensure a proper fit. Do NOT sandblast the hole and expect it to remain the same size
