Although Subaru did a great job with the new FA20DIT engine, there is one common problem that occurs when an aftermarket exhaust is installed: blue smoke from oil burn. This is a fairly odd problem, but it’s obnoxiously common, so Perrin took it upon themselves to develop a simple solution to this problem. The whole problem occurs aftermarket exhaust is installed, which decreases exhaust pressure. This decrease in pressure allows engine oil to escape from the turbo seals and into the exhaust system.
The solution to this problem is to slightly restrict the flow of the turbo sump pump. This creates a slight vacuum on the turbo sump, ultimately balancing out the pressure difference from the aftermarket exhaust. This balance in pressure stops oil from leaking out of the turbo seals and stops the obnoxious oil burning. The part itself is very small and pretty easy to install. Simply cut the OEM rubber line from the turbo sump and install the restrictor.
You may be wondering if this product has actually been proven to stop the oil burning. Perrin has been testing this little product over the course of the last two years with great success. They now feel confident enough with their design to release it to the public. It should be noted that not all exhaust systems will create this problem, but the majority of them do. Before you purchase an exhaust system, it’s probably a good idea to pick up this little part.
If you have any questions about Perrin Turbo Sump Restrictor for 2015+ WRX or would parts for your WRX, please do not hesitate to contact us. We can be reached by phone at 1.480.966.3040 or via email at [email protected].
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can you use this sump restrictor with just an stage 2 ots map from cobb i will be getting a pro tune some time soon but wanted to know if iI can still use this part as it is for now.
This part is safe to use with a Stage 2 or higher WRX.
Can this be installed safely with the factory j pipe and exhaust @ stage 1? I understand this is meant for stage 2. I plan to eventually go that route and just want to have all supporting mods and parts on hand or installed before doing the exhaust. Thanks!
You can do that but usually we do recommend tuning at the same time as it will cause CEL! For some more info on how we can help shoot us an email at [email protected]!