35mm Billet 12AN Turbo Drain Oil Flange

Stop fighting undersized drain ports and sloppy castings. This 35mm billet 12AN turbo drain flange is machined to do the job right, the first time.

Features & Benefits

Billet Construction, Not Cast

Machined from billet aluminium for superior strength, crack resistance, and a precision sealing surface that castings simply can’t match. No porosity, no surprises.

Built for Mid-Frame & Large-Frame Turbos

The 35mm bolt pattern is matched to the oil-drain pad found on common mid-frame and large-frame turbochargers, making it a straightforward fit whether you’re running an S300, S400, HX40, or similar platform — journal bearing or ball bearing.

12AN Port for High-Volume Oil Return

Larger-frame turbos flow more oil and need a drain that keeps up. The 12AN port pairs directly with a 12AN braided stainless drain line for a clean, high-flow return that won’t back up oil into your seals.

Precision-Machined Sealing Surface

Every face is machined flat so your gasket seals properly and stays sealed, helping you avoid chasing leaks after the build is done.

Made by BSI Inc.

Manufactured by Black Sheep Industries right here in Canada, with CAD pricing and shipping across North America. You’re getting a part built to a standard, not a price.

Whether you’re assembling a fresh turbo build, replacing a tired factory drain flange, or upgrading to a proper AN drain line, this flange gives you a reliable, leak-free foundation from day one.

FAQ

What turbochargers is this flange built for?

It is built for common mid-frame and large-frame turbochargers with a 35mm oil-drain bolt pattern, including S300, S400, HX40, or similar platforms.

What oil drain line size does this flange use?

This flange uses a 12AN port designed to pair directly with a 12AN braided stainless drain line.

Why is billet aluminium construction used?

Billet aluminium provides superior strength, crack resistance, and a precision sealing surface compared with castings.

Where is this turbo drain flange made?

It is manufactured by Black Sheep Industries in Canada, with CAD pricing and shipping across North America.