Perrin Performance Turbo Sump Restrictor | 2015-2017 Subaru WRX and 2014-2018 Subaru Forester XT (PSP-ENG-628)

Perrin Performance
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$45.05 $53.00Instant Savings of 15% ($7.95)

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2015-2017 Subaru WRX and 2014-2018 Subaru Forester XT Turbo Sump Restrictor by Perrin

Many customers experience a burning oil problem or blue smoke coming from their exhaust after installing aftermarket J-Pipes or turbo back exhaust systems. Installing these parts on 2015+ WRXs (FA DIT engine) causes a change in exhaust pressure, allowing engine oil to escape out the turbo seals. This leaks into the exhaust creating the burning oil smell and blue smoke that many people see.

The PERRIN Turbo Sump Restrictor makes the turbo sump pump more effective at sucking oil out of the turbo sump. This in turn creates a slight vacuum on the turbo sump creating a proper balance of exhaust pressure and vacuum on the turbo seals, significantly reducing the amount of leaking around the turbo seals. This does not change the oil flow to the turbo in any way.

Since drivers have been installing turbo back exhausts on 2015+ FA DIT WRXs, there have been both burning oil smell and blue exhaust smoke issues. After a short period of time, we found a great solution in the form of the PERRIN Turbo Sump Restrictor. We wanted to make sure we could come up with an effective solution and tested our solution over the course of two years. We now feel confident releasing this product to the public!


  • CNC Machined Aluminum Body
  • Nickel Plated Zinc Barbed Fittings
  • Black Anodize Finish

Please Note: Will NOT fix issues relating to blue smoke due to blown engines.


  • 2015 - 2017 Subaru WRX
  • 2014 - 2018 Subaru Forester XT

What's In The Box?

  • 1 - PERRIN Sump Pump Restrictor
  • 1 - Nickel 1/4" Barb to 1/4-28 Thread with Gasket
  • 2 - 8-16mm Clamps
  • 3 - 8" Zip ties


  • Perrin 5 Year Limited Warranty

Customer Reviews

Based on 36 reviews
Bryan Menjivar

Works great comes with everything needed

Khalil Bright

Very simple install, works as advertised. Got it for stage 2+.
It works great

Evan D.

Does what it claims and easy to install.
A must have when modding your car. And you have the choice to run it inline or plumb it to your Air Oil Separator solid product

Just what I needed

Just what I needed to stop the seals from pulling oil through with my full exhaust

Caleb Grimes
Much needed

Needed for going stage 2+ help with smell and smoke a lot. Easy to install.