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Ultimate Air/Oil Separator for Lexus GSF/IS500
Lexus Air/Oil Separator

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Our Price: $375.00

Availability: Usually Ships in 2 to 3 Days
Product Code: ULTAOS0003

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RR Racing has been at the forefront of Air/Oil Separator development for Lexus F platform cars, with our original AOS introduced 8 years ago! We have proven, time and again, that usage of an AOS is critical for reducing intake carbon deposits caused by ingestion of oil through the PCV system. Carbon deposits and burning of oil vapors reduce the effective octane of the incoming air/fuel mixture, causing power loss due to detonation and ignition correction.

The ULTIMATE Air/Oil Separator is the culmination of all our track and street experience tuning, supercharging, and tracking Lexus F cars. With our latest premium version air/oil separator we thoroughly designed a new product, from the ground up, making it the best possible product you can buy for any price, bar none.

Features of our new Ultimate Air/Oil Separator include:

  • All billet aluminum CNC construction of every component, for maximum form & function. Rather than use generic components from someone else’s parts bin, every component of the Ultimate AOS is designed for your Lexus.
  • New MAGNETIC mounting system. The AOS canister is attached with a magnet, so removal for cleaning is EXTREMELY EASY, no bolts, hardware, or tools required!
  • New dipstick for checking oil level. You don’t even have to open the canister to check oil level, simply unscrew the dipstick and check the level.
  • Unique billet CNC machined inner swirl generator creates a high velocity swirl pot resulting in efficient coalescence of oil droplets on the wall of the billet canister. This design is super-efficient, and unlike other Air/Oil separators on the market does not require packing the canister with a mess of mesh (as used on other AOS designs). Cleaning is super easy, just spray the canister with some de-greaser, and re-assemble.
  • STANDARD billet secondary PCV valve. Yes, your car already has a PCV valve, but we have found that the OEM PCV Valve, which is nearly impossible to replace without removing the intake manifold, often starts to leak on higher mileage cars (typically above 70,000 miles). Malfunctioning PCV leads to excess injection of blow by gasses, and in many cases reduction in long term ignition correction, known as the “KCLV” factor that the ECU uses to determine ignition timing. Our billet PCV valve has effectively increased KCLV values on many customer cars experiencing lower power, hesitation, and knock correction issues.
  • Genuine Fragola/Parker blue rubber hoses look great and are extremely oil and fuel resistant.

So whether you track your F, or just drive aggressively on the street, our new AOS is the ULTIMATE upgrade that is not only functional, but doesn’t look too shabby either!

Compatibility Table

Make Model Year Range
Lexus RC F 2015 +
Lexus GS F 2015 +

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 2 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 High Quality AOS April 12, 2024
Reviewer: Scott W. from Rincon, GA United States  
Recently purchased the Ultimate AOS. For my 2024 IS500.  Installation is pretty straight forward and the Looks as good as it works. Checked canister a week after installation and the AOS is definitely working by keeping oil out of the intake.  Highly recommended!

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  1 of 1 people found the following review helpful:
5 of 5 Ultimate AOS installed on 2016 Lexus GSF April 9, 2024
Reviewer: Cory from Destin FL  
Recently installed the ULTIMATE AOS on my GSF and the overall construction is superb. The magnetic base allows for easy installation and removal for when emptying the canister. The dipstick is a very nice touch to help keep an eye on oil level!  The billet  design is sturdy as well as aesthetically pleasing. I really like the fact there is an additional PCV valve placed in line within the supplied silicon hose. This is a simple mod that helps prevent oil vapors from being ingested back into the engine, plus it looks factory!  Lastly, and most importantly, the Ultimate AOS fits under the stock engine cover with zero issues/trimming. As well as the kit comes completely ready to install with just the installation of the bracket and two hoses! With the black Push-Lok hoses, the Ultimate AOS looks factory and clean!

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