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Prova Air Oil Separator  ( Part Number:PRV 50000TK0011)

Prova Air Oil Separator

Part #: PRV 50000TK0011


Brand: Prova
Color: Black
Installation Hardware Included: Yes
Material: Aluminum

Mfgr. Warranty: 1 year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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The Prova Subaru Air Oil Separator is a great way to cut down on unwanted oil in the intake track. By reducing the oil that enters the intake track, you will ultimately have a cleaner intake system but more importantly the oil in the intake track if sucked into the motor can induce detonation.

The Prova Air Oil Separator is a different design type and is a great alternative to an oil catch can. Instead of collecting the oil and letting it pool into a can, the Prova system allows this oil blow by to enter back into the oil system directly via the oil fill tube. This eliminates the problem of overfilling your catch can resulting oil starvation issues due to having collected too much oil in your catch can.

Installation is very straight forward. It will work with your factory Subaru Oil Fill tube and your stock PCV System.


Verified Purchase

2015 STI fitment confirmed
2015cbssti 2 years ago
Overall the product it very good quality. Confirmed to fit on the 15 STI. Had to get a little creative with the hose routing to accommodate the sensor that is not on previous year models.

hachi6k 8 years ago
Prova has used this part on their 24hr Nurburgring endurance race. I had the opportunity to stop by their shop while visiting Japan. This product installs quickly in a 06 STI. Took me about 10 minutes of routing the 2 hoses tightening down the adapter and re-screwing the oil filler cap. Job done!

  • Q: Hose setup  capilarybinkie 2 years ago


    In the interest of having a clean look, would it be possible to change where the hoses go into the actual aos unit? For example in the picture the house from the turbo inlet goes to the pipe on the oas closest to the firewall, and the line from the metal piece on the intercooler goes on the pipe closest to the front of the car. Would it be possible to switch the two? I would like to be able to route lines underneath the intake manifold and intercooler, but don't want to cross them over each other. Thanks!

    • A: We do not advise that you deviate from the installation instructions provided by Prova. This system was designed to be installed one way.

      Josh P. 2 years ago
  • Q: This VS the Grimmspeed?  DEASubie 3 years ago


    This looks even more streamlined and dimple than the Grimmspeed version, but to be perfectly honest I've only been into subaru for 2 years and the turbo versions less than a year and have not really studied all the hoses running everywhere so I'm somewhat lost just looking at a few pics or install videos as the what is going on when hoses are getting cut and rerouted and things are getting capped off. I notice this AOS is similar to the GS AOS, but this one only has the 2 hose fittings VS the GS having 3, what impact does this have? I'm definitely getting the PW IC but I'm still trying to settle on a AOS to get so please help :)

    • A: The Grimmspeed uses three lines because it has two inlets from each breather from the engine, the Prova combines both of these in one. There is no wrong way necessarily, it just depends which brand you wanted to support between the two.

      Nick S. 3 years ago
  • Q: NA 2.5i application query  evaradar 3 years ago


    I know this is compatible for NA 2,5i vehicles, however I wanted to know what the drawbacks of installing this are. Also would it be beneficial if for DD use with some light track use? Thanks

    • A: There are no drawbacks to an air oil separator and they will help reduce oil consumption in both street and track applications.

      Nick S. 3 years ago
  • Q: 2015 WRX STI, soon?  breakeard75107 3 years ago


    Will this work on the new 2015 WRX STI? Just wondering. I know it is not listed under the compatible. The 2015 STI still uses the same motor.

    • A: Yes, this will fit no issue. As there were no changes on the engine from the previous years.

      Brady R. 3 years ago
  • Q: prova air oil separator  jeffreyasian20357730 3 years ago


    how do you install it with a FMIC…any write up or videos..or its the same

    • A: The installation with FMIC will be nearly the same as with TMIC, but you may need to extend and reroute some hoses.

      Zach G. 3 years ago