3MI Racing LLC

12/24/2025

So these OEM Location Turbo drain hose kits were quietly released a few months back to our retailers and installers. This AOS drainhose kit is designed as an OEM location specific kit to remove the fear and measuring that comes with using our universal kit, particularly for first-time time installers.

We still sell our universal kit (long hose) for people with rotated turbos. We also have several Subaru specialty shops stock them as an easy upgrade to keep on hand to go along with AOS installs, or to upgrade an AOS during a turbo upgrade. "Would you like fries with that?"

Please reach out to our retailers for purchase; Flatirons Tuning Import Image Racing or Penguin Garage

Specialty shops can inquire directly for jobber/wholesale pricing.

05/31/2024

02/29/2024

Thanks to Flatirons Tuning for being so fantastic to work with. Give the video a look and a like. Check out the other Subaru content they've put together while over on their page.

The 3MI Air Oil Separator for most Subaru AOS's came out a while back, and we have been recommending it to maximize the effectiveness of your AOS.

08/27/2023

Man, I am terrible about posting on here!!

So the AOS Drain Hose kits have been released for about 18 months now and they have gained great feedback from users.

TLDR; it helps keep your oil where it belongs, in the sump and not your AOS system.

They allow the AOS to more efficiently drain through the turbo oil drain, and not TRY to drain into the crankcase vent. This actually replaces the turbo drain hose in the system and allows the crankcase breather to vent unhindered.

We have adapter kits to allow them to fit most popular AOS kits foe your turbo EJ engine.

Check them out , or

08/10/2023

Our friends over at Import Image Racing are now stocked up on our AOS drain hose kits. Head on over to them to help get your AOS working better than ever!!

Fitment Information: 2002-2014 Subaru WRX 2004-2021 Subaru STI Please note: This kit is a direct fit for your KillerB or Verus AOS system. Other AOS systems may require additional components for the installation. Features: Many drain hose installations have the drain hose close to horizontal or with...