COBB Air Oil Separator
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COBB Air Oil Separator - Ford Focus ST (LW/LZ)
The COBB air oil separator fits into the crankcase ventilation system of the 2013-2018 Ford Focus ST (LW/LZ) to stop oil vapour reaching the intake. Oil vapour in the intake lowers the effective octane of the fuel and adds to oil and carbon build-up over time.
Video
Product highlight – COBB air oil separator for the Ford Focus ST and RS
The canister installs in series with the factory PCV circuit. Blow-by gases pass through a swirl pot and a series of baffles, where heavier oil particles condense and collect at the base, and a drain line returns that oil to the crankcase. To suit the EcoBoost engine, COBB uses the factory breather plate with its own drain plate, sandwiched between the factory separator and the block with an extra factory gasket for a leak-free seal.
Note: Installs in series with the factory PCV system. Installation by a professional is recommended.
Features
- Billet aluminium canister with bright black dip anodising
- Extra baffling in both the plate and the canister
- Drain line returns collected oil to the crankcase
- Injection-moulded 33% glass-filled nylon drain plate
- Laser-etched COBB logo
- Designed fully in-house by COBB
Pairs Well With
- COBB Shift Knob - Ford Focus ST (LW/LZ) / Focus RS (LZ)
- COBB Exhaust Hanger Kit - Ford Focus ST (LW/LZ)
- COBB Stage 1+ Drivetrain Package - Ford Focus ST (LW/LZ) / Focus RS (LZ)
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Ford | Focus ST | LZ | EcoBoost |
Product
- Brand
- COBB Tuning
- Part number(s)
- 891610
Details
- Product type
- Air oil separator
- Canister
- Billet aluminium, bright black dip anodised
- Drain plate
- 33% glass-filled nylon, injection moulded
- System
- In series with factory PCV, drain-back to crankcase
Contents
Billet aluminium air oil separator canister
Drain plate
Factory-style gasket
Mounting bracket
Hoses and fittings
Hose clamps
Hardware

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