Perrin Turbo Sump Restrictor - WRX (15+)
Fix both the burning oil smell and blue exhaust smoke problems associated with your WRX turboback exhaust or Stage 2 and higher WRX by installing the PERRIN Turbo Sump Restrictor.
Why you want this:
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 causes a change in exhaust pressure, allowing the engine oil to escape out of the turbo seals. This leaks into the exhaust creating the burning oil smell and blue smoke that many people see. Cars with catless J-Pipe setups experience this issue much more than cars with high-flow cats.
How the Perrin part works:
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+ WRXs, there have been both burning oil smells 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 soluction over the course of two years. We now feel confident releasing this product to the public.