65mm Billet 12AN Turbo Drain Oil Flange

Stop fighting ill-fitting drain flanges. This precision billet 12AN turbo drain flange is machined to match the 65mm bolt circle of mid-frame and large-frame turbochargers right out of the box.

Why Builders Choose This Flange

Purpose-Built Fitment

The 65mm bolt pattern is engineered specifically for mid-frame and large-frame turbos, giving you a clean, confident bolt-on installation without the guesswork that comes with generic universal flanges.

12AN Port for Maximum Oil Return Flow

A 12AN male port delivers a larger oil return passage than common -10AN alternatives, helping keep oil moving freely back to the sump and reducing the risk of centre-housing oil pooling, whether you are running a journal-bearing or ball-bearing unit.

Precision-Machined Sealing Surface

Billet construction means every sealing surface comes off the machine clean and true, giving you a reliable, leak-free interface between your turbo and your drain line with no chasing warped or porous castings.

Straight-Forward Installation

The direct bolt-on design fits without modification to your turbo's centre housing, making it an easy drop-in addition to any build, including street performance, track, or high-output applications.

Made by BSI Inc.

Produced by Black Sheep Industries, this flange is available with domestic North American pricing and shipping, with no expensive cross-border freight or surprise duties eating into your build budget.

FAQ

What turbochargers is this 65mm billet 12AN turbo drain flange made for?

It is machined to match the 65mm bolt circle of mid-frame and large-frame turbochargers.

Does the 12AN port improve oil return flow?

The 12AN male port provides a larger oil return passage than common -10AN alternatives, helping oil move freely back to the sump and reducing the risk of centre-housing oil pooling.

Is this flange suitable for journal-bearing and ball-bearing turbos?

Yes. The draft states it can be used whether you are running a journal-bearing or ball-bearing unit.

Does installation require modifying the turbo centre housing?

No. The direct bolt-on design fits without modification to your turbo's centre housing.