Replacement Large/Mid Frame Turbo Drain O-RingA leaking turbo drain flange is one of the easiest fixes in the shop — as long as you have the right seal on hand. This direct-fit large mid frame turbo drain o-ring replacement from BSI Inc. gets you back to a clean, leak-free build without tearing your setup apart.Why This O-Ring Belongs in Your Parts Stash Precision fit for large and mid-frame applications — engineered specifically for BSI Inc. and True North Turbos (TNT) drain flanges, so you're not guessing with a generic kit. Oil-resistant elastomer construction — formulated to hold up against the high-temperature oil flow conditions common at the turbo drain, where lesser seals fail first. Dead-simple installation — a true drop-in replacement that needs nothing beyond access to your drain flange; no special tools, no turbo disassembly, no machining. Smart preventive maintenance — at this price point, replacing the o-ring at every drain service costs next to nothing compared to chasing an oil leak across your garage floor. Ships from British Columbia — domestic fulfilment for Canadian customers means faster delivery and no border headaches, with the same parts reaching builders across North America. Stop the drip at the source — one small seal makes the difference between a tight, professional turbo build and an oil leak you'll be diagnosing for weeks.FAQWhat drain flanges does this o-ring fit?This o-ring is engineered specifically for BSI Inc. and True North Turbos (TNT) drain flanges in large and mid-frame applications.Do I need special tools to install it?No. This is a drop-in replacement that only requires access to your drain flange, with no special tools, turbo disassembly, or machining.Why replace the o-ring during drain service?Replacing the o-ring at every drain service is a simple preventive step that costs very little compared to chasing an oil leak across your garage floor.Where does it ship from?It ships from British Columbia, with domestic fulfilment for Canadian customers and parts also reaching builders across North America.
