Stop chasing oil leaks from weak cast flanges. This precision CNC-machined 35mm billet 10AN turbo drain oil flange gives your mid-frame turbo's oil return system a solid foundation.

Features & Benefits

Billet Construction Over Cast

Machined from billet aluminium rather than poured in a mould, this flange delivers superior material density, a tighter grain structure, and a precision-flat sealing surface that cast imports simply can't match. Fewer voids means fewer leak paths, especially important on a high-heat turbo oil return where a weeping flange can quickly become a real problem.

Designed for Mid-Frame Turbos

The 35mm bolt circle is drilled to mate directly with the oil drain port on mid-frame turbochargers, covering both journal bearing and ball bearing configurations. The compact profile is engineered with tight diesel engine bay packaging in mind, so you're not fighting clearance issues during the install.

Direct -10 AN Oil Return Connection

The 10AN male port gives you a clean, straight-forward connection to your AN-10 drain line or oil return hose with no adapters and no jury-rigged fittings. Whether you're plumbing a fresh build or upgrading a leaky OEM-style drain setup, the thread engagement is precise and positive.

CNC Precision You Can Feel

Every face and bore is CNC machined to consistent tolerances, so the sealing surface sits flat against your turbo's drain flange every time. That consistency matters when you're torquing down on a turbo that sees extreme thermal cycling in a hard-working diesel application.

Made in Canada by Black Sheep Industries / True North Turbos

Manufactured domestically and available at a price point that competes with US performance shop imports, without the exchange rate hit, long wait times, or uncertainty of overseas generic parts. Built for the harsh winter road salt and temperature swings that North American performance and diesel builds face every season.

Upgrade your turbo oil drain flange once, and do it right — this is the billet 10AN turbo drain flange that belongs in a serious build.

FAQ

What turbochargers is this flange designed for?

This flange is designed for mid-frame turbochargers with a 35mm bolt circle oil drain port, covering both journal bearing and ball bearing configurations.

What oil return connection does it use?

It uses a 10AN male port for a direct connection to an AN-10 drain line or oil return hose, with no adapters or jury-rigged fittings.

Why choose billet aluminium over a cast flange?

Billet aluminium provides superior material density, a tighter grain structure, and a precision-flat sealing surface compared with poured cast flanges. Fewer voids means fewer leak paths on a high-heat turbo oil return.

Is this turbo drain flange made in Canada?

Yes. It is manufactured in Canada by Black Sheep Industries / True North Turbos.