COBB Tuning Air Oil Separator (AOS) Ford Focus RS (LZ)

COBB Tuning Air Oil Separator (AOS) - Ford Focus RS (LZ)

COBB Tuning has been developing performance hardware for turbocharged platforms for decades, and their Air Oil Separator is a product that reflects that experience. Designed entirely in-house, this AOS addresses a genuine weak point in the Ford Focus RS crankcase ventilation system — oil vapour recirculating through the intake — and solves it with a clean, engineered solution rather than a generic catch can bodge.

This listing covers the COBB Tuning AOS kit for the Ford Focus RS LZ (2016–2018) running the 2.3L EcoBoost engine. One variant is available: Default Title (SKU: 892620).

Key Features

• Installs in series with the factory PCV circuit — no permanent modifications required
• Billet aluminium canister with bright black dip anodising
• 33% glass-filled nylon injection moulded spacer plate for precise fitment against the factory breather plate
• COBB oil drain plate sandwiched between the OEM air oil separator and engine block, using a supplied OEM-spec gasket for a leak-free seal
• Swirl pot and multi-baffle design condenses oil particles from blowby vapour, collecting them as liquid at the base of the canister
• Drain-back system returns collected oil to the crankcase — no manual emptying required
• Reduces oil and carbon buildup on intake valves
• Helps maintain effective fuel octane rating by keeping oil vapour out of the intake charge
• Laser etched COBB logo

Vehicle compatibility, fitment notes, and any additional installation requirements are listed in the tabs above. Confirm your vehicle's year and build before ordering.

Not sure if this kit suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.