100mm Billet 10AN Turbo Drain Oil Flange — Small-Frame

Stop fighting with leaky cast flanges. This 100mm billet 10AN turbo drain flange small frame fitment from BSI Inc. is precision-machined to give your small-frame turbo build a clean, high-flow oil return you can trust.

Features & Benefits

• Billet construction — Machined from solid billet for a flatter, more consistent sealing surface than the cast flanges that come stock on most small-frame turbos. Less distortion, fewer leaks, longer service life.
• 100mm mounting pattern — Designed to suit small-frame turbocharger bearing housings, including T3, T4, GT28, GT30, and GT35 class units with a compatible 100mm drain port layout. Fits journal-bearing and ball-bearing turbos alike.
• 10AN male port — The full-sized 10AN fitting outlet supports high-flow oil return, keeping your drain line running freely and your bearing housing clear of oil pooling.
• Precision-machined sealing surface — Every face is machined to a tight tolerance so your drain gasket or O-ring seats properly and holds under real operating conditions.
• Direct upgrade over OEM cast — Drop this in where a stock or cast drain flange would go and immediately step up to a part built for performance builds — gas or diesel, street or track.
• Made in Canada by BSI Inc. — Machined domestically and ships from Canada, so North American builders get a quality billet part without the brokerage fees, border delays, or currency conversion headaches that come with importing from US-based competitors.

Upgrade your oiling system the right way — one precision part at a time.

FAQ

What turbochargers is this 100mm billet 10AN turbo drain flange designed for?

It is designed to suit small-frame turbocharger bearing housings, including T3, T4, GT28, GT30, and GT35 class units with a compatible 100mm drain port layout.

Does this flange work with journal-bearing and ball-bearing turbos?

Yes. The draft states it fits journal-bearing and ball-bearing turbos alike when the turbo has a compatible 100mm drain port layout.

What fitting outlet does this turbo drain flange use?

It uses a full-sized 10AN male port to support high-flow oil return and help keep the drain line running freely.

Why choose this billet flange over an OEM cast drain flange?

The billet construction provides a flatter, more consistent sealing surface than many stock cast flanges, helping reduce distortion and leaks while supporting longer service life.

Is this turbo drain flange made in Canada?

Yes. It is made in Canada by BSI Inc. and ships from Canada.