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RR Racing Air/Oil Separator for Lexus IS/GS
Lexus Air/Oil Separator

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Our Price: $189.99

Availability: Usually Ships in 3 to 5 Business Days
Product Code: ISXAOS0002


The 300/350 Air/Oil separator is a by product of our IS-F track development program. We finally added an air/oil separator to our IS line. Testing our shop IS350 on the track and on the road showed accumulation of oil and other contaminants in the canister.

During on track testing and data logging, it became clear that the PCV (Positive Crankcase Ventilation) was allowing for significant ingestion of oil into the engine (see diagram in the photo gallery of this product). Oil ingestion results in ignition retard due to the low octane of engine oil as it burns up. Additionally, oil burning in the engine results in carbon deposits on the intake valves, pistons, and combustion chamber which further increases the propensity for power-robbing detonation. You don't have to take your IS to the track to benefit from our Air/Oil Separator. Anyone who drives aggressively on twisty roads with hard acceleration and deceleration will benefit from avoiding oil ingestion into the engine.

The RR-Racing Air/Oil Separator is a fully sealed design featuring a level indicator for easy inspection. We utilize only the finest quality push-to-connect fittings and urethane hoses. All you have to do is check the level indicator and periodically empty the canister.

Please note that although the canister fits GS350 models, on some vehicles it may slightly touch the brake hydraulic line from the master cylinder. In this case, the bracket may be bent slightly upwards to avoid touching the line.

All components in this product are proudly engineered and manufactured here in the United States of America.

Please click on one of the links below for more relevant detailed information about our approach to engineering great products for your Lexus:

RR Racing Lexus IS-F Project.

Compatibility Table
Make Model Year Range
Lexus IS300 (AWD) 2014-2016
Lexus IS300 (RWD) 2014-2016
Lexus IS350 2014-2016
Lexus RC300/350 2015-2017
Lexus GS350 2013-2015

Average Rating: Average Rating: 3 of 5 3 of 5 Total Reviews: 2 Write a review »

  0 of 0 people found the following review helpful:
1 of 5 Bad experience August 27, 2023
Reviewer: Gabriel Charles from Phoenix , AZ United States  
Installed air/oil separator for my 14 is350 and had problems. Noticed right after install my brake pedal was shaking then about 20 miles later the line to the intake had broke and CEL came on. Possible defective product?

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  0 of 0 people found the following review helpful:
5 of 5 June 11, 2023
Reviewer: Colin Langsam from Yorktown heights, NY United States  

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