Cobb Tuning Air Oil Separator (AOS)Ford Focus ST LZ 13-18 1999-saturn-sw1-esi9899263 · Vented to allow expansion

· Vented to allow expansion and contraction of fluid while maintaining a tight seal

and improves both form and function

DSG tune requires a matching ECU Tune

This MACH Force-Xp Cat-Back exhaust system is constructed of 3" mandrel-bent stainless steel tubing and comes complete with free-flowing high temp black powder-coated muffler

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Cobb Tuning Air Oil Separator (AOS)Ford Focus ST LZ 13-18 1999-saturn-sw1-esi9899263 · Vented to allow expansionDESCRIPTION The COBB Air Oil Separator is placed within your Ford Focus ST's crankcase ventilation system and helps to prevent oil vapors from being introduced into the intake system. The COBB Air Oil Separator is of our own design and has been in the works for years, making tweaks and updates to ensure that it is a seamless installation, clears any third party emissions, an is the perfect upgrade to your engine. Ford's EcoBoost engine doesn't have a