Verus Engineering AOS Drain Back Kit - 2015-2021 Subaru WRX PDM_pilot-and-throw-out-bearings a stainless steel C-Clip and

a stainless steel C-Clip and spring to increase sealing and durability

Very durable construction

Your product can be shipped to you from your dealer

mileage and throttle response

Verus Engineering AOS Drain Back Kit - 2015-2021 Subaru WRX PDM_pilot-and-throw-out-bearings a stainless steel C-Clip andThe optional AOS Drain Kit allows for hassle free, long term use of the AOS without the need for draining or maintenance. It provides an effortless solution for those who prefer a hands off approach. The AOS functions like a standard drain style unit by default. Verus Engineering AOS Drain Back Kit SPECS: Automatically Drains Oil Caught in the AOS Back into the Engine Maintenance Free Oil Separation CNC Machined Aluminum and Anodized Fittings 1 2"