Perrin Turbo Sump Restrictor 2018-2024 WRX / 2019-2025 Ascent / 2020-2025 Legacy XT / 2020-2025 Outback XT / 2017-2018 Forester XT

Fix both the burning oil smell and blue exhaust smoke problems by installing the PERRIN Turbo Sump Restrictor! 

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 or create any wear.

Many people experience a burning oil problem and blue smoke coming from their exhaust. This problem can worsen after installing a cat-back exhaust, J-pipe, or turbo-back exhaust system. The installation of these parts can cause a change in exhaust pressure that allows engine oil to escape out of the turbo seals, causing the burning oil smell and blue smoke. The PERRIN Turbo Sump Restrictor quickly eliminates this issue!

Key Features:

• Eliminate burning oil and blue smoke
• No tuning is required after installation
• Makes the turbo sump more effective
• Creates a balance of exhaust pressure and vacuum on turbo seals
• Reduces the amount of leaking around turbo seals
• Does not change oil flow to turbo

Note: This does not fit the 2025 WRX, please see PSP-ENG-628. 

Included:

(1) PERRIN Sump Pump Restrictor
(1) Size 6 Clamp
(1) 1/4 - 28 Plug

Installation Instructions