The Radium air/oil separator traps blow-by oil before it can be sent back to the induction system. The collected oil is heated by the AOS to remove moisture, then allowed to drain back into the engine block, making this a zero maintenance system. Installation is done using factory mounting points. All required hardware, hoses and other items are included in the kit.
Year
Make
Model
Submodel
2015 - 2020
Subaru
WRX STI
Base
2015
Subaru
WRX STI
Launch Edition
2015 - 2020
Subaru
WRX STI
Limited
2016
Subaru
WRX STI
Series.HyperBlue
2018
Subaru
WRX STI
Type RA
