SKU: 98999473542

COBB Air-Oil Separator for 2013-2018 Ford Focus

Sale price$193.50 Regular price$215.00
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Description

COBB Air-Oil Separator for 2013-2018 Ford FocusDESCRIPTION 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

DESCRIPTION

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 great spot to tap in, so we went with the route of incorporating the factory breather plate with a spacer plate that we created from 33% glass-filled nylon and is injection molded for perfect fitment. The COBB oil drain plate is sandwiched between the OEM air oil separator and engine block. It uses an additional COBB provided OEM gasket to maintain a leak-free interface with the engine block.

The COBB Air/Oil Separator system installs in series with the original PCV circuit, forcing air from the crankcase through a swirl pot and series of baffles that promote heavier oil particles in the blowby vapor to condense and collect as a liquid at the base of the canister. A drain line returns this condensed liquid oil to the crankcase.

This AOS kit that utilizes a drain-back system keeps valves cleaner and reduces chances of detonation by removing oil particles from the PCV gasses going to the intake manifold. This equates to a cleaner and stronger engine that can push more power with less maintenance or risk.

A Sound Symposer Delete is required to install this AOS. If you don't have one, follow this link to our COBB Sound Symposer Delete Kit.

WHY?

The COBB Ford Air/Oil Separator helps to prevent crankcase oil vapors from recirculating back through your engine's intake system.

Oil vapors passing through your engine's intake system lower the effective octane rating of fuel and can contribute to both oil and carbon buildup over time.

FEATURES
Air/Oil Separator for Ford Focus ST 2013-2018
  • Billet Aluminum Tank Design
  • Bright Black Dip Anodizing
  • Additional Baffling At Both Plate and Canister
  • Laser Etched COBB Logo
  • Designed 100% in-house
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 98999473542

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Amazon Customer
Massapequa, US
★★★★★ 5
Perfect
Color: Light Champagne, Size: 7
Fits a little loose; but it will bring a tear to your eye to see your son dressed in this
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Reviewed in the United States on April 15, 2026
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Marlyn Hidalgo
Chelsea, US
★★★★★ 5
Excelente calidad con el traje
Color: White, Size: 7
Es excelente, a mi hijo le quedó muy bien, la tela de una buena calidad. Lo recomiendo
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Reviewed in the United States on March 22, 2026
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Lena Delgado
Battle Creek, US
★★★★★ 5
Beautiful
Color: White, Size: 6
AWESOME QUALITY
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Reviewed in the United States on October 31, 2025
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Sun Valley
Lake Worth, US
★★★★★ 4
35% cotton shirt, 25% linen suit
Color: White, Size: 6, Color: White, Size: 6
This formal suit is not as white as I thought it was going to be. It’s off white due to it having 25% linen, which gives it a natural, “more expensive” sort of look. My 5yo said “it’s a little itchy but looks nice”. I think it’s just stiff because it’s new. I’m going to wash the button shirt and see how it is after washing. I do wish it was 100% cotton. The button shirt is made of a cotton blend with 35% cotton. The stitching is very clean. Well made. As you can tell, it’s a little loose on my average size 5yo. I got him size 6. This will be a great suit for one of the kids piano recitals.
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Reviewed in the United States on September 18, 2025
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daniela galvis
Fort Morgan, US
★★★★★ 5
Traje joven
Size: 14, Color: Beige
Compré este traje tipo esmoquin para la confirmación de mi hijo de 13 años y quedé encantada. La calidad de la tela es súper buena, se ve elegante y tiene un acabado muy bonito. Además, orma excelente y le quedó perfecto. Se veía muy elegante para una ocasión tan especial. Definitivamente lo recomiend
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Reviewed in the United States on May 26, 2026

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