Mishimoto Oil Catch Can Baffled Silverstone BMW M3 M4

The Mishimoto Oil Catch Can Baffled Silverstone for BMW M3/M4 captures crankcase blow-by to protect the intake tract and turbo system, improving long-term reliability for 2015–2020 S55-powered vehicles.

Designed by Mishimoto, this baffled catch can targets the oil-laden vapors produced by blow-by on the S55 engine family introduced in the 2015 M3 and M4. By intercepting condensates and oil droplets before they enter the intake or turbo inlet, the unit helps maintain cleaner intake charge paths and reduces deposit formation on intake valves and intercooler cores.

• Baffled internal design — Controls oil slosh and promotes separation of oil from crankcase vapors for consistent trapping under varied driving conditions.
• Vehicle-specific fitment for BMW M3/M4 (2015–2020) — Engineered to match routing and mounting points appropriate for the S55-equipped compact M platforms.
• Silverstone finish — Offers a corrosion-resistant exterior intended to withstand under-hood environments while retaining a factory-compatible appearance.
• Mishimoto engineering and validation — Built to the brand’s standards for durability and repeated serviceability in performance and daily-driven applications.

Installation notes and serviceability:

• Mounting and hose connections are configured for direct integration with S55 PCV and crankcase ventilation plumbing as found on 2015–2020 M3/M4 models.
• Service access is considered in the design to allow periodic draining and inspection without major disassembly.

Why this matters: removing oil from the ventilation stream reduces the rate of carbon and oil deposit accumulation in the intake system and turbocharger inlet, which supports more consistent engine behavior and simplifies maintenance over time.

Mishimoto stands behind the product with the brand experience associated with motorsports-derived cooling and engine management components, applying that same focus on functionality and durability to this catch can solution.