Designed with the marine environment in mind, this precision CNC-machined adapter transforms the way oil changes are handled in tight engine compartments. Built from solid 6061-T6 billet aluminum and anodized in a rich, corrosion-resistant blue, this fitting converts any M12-1.75 drain plug port into a -6 AN male outlet, allowing you to route your oil drain line wherever you need it.
 
Purpose-Built for LS Marine Conversions
 
This fitting was specifically engineered for LS-series and similar engine platforms commonly used in custom marine builds and MerCruiser LS conversions. In many jet boats, ski boats, and inboard setups, the oil drain plug on the LS pan is positioned deep between the stringers—making oil changes a messy and time-consuming task.
 
This adapter solves that problem by allowing you to route a clean, remote oil drain line through a bulkhead, transom, or to a more accessible location. It’s a simple addition that makes regular maintenance faster, cleaner, and more professional.
 
Resilient and Ready for the Water
 
Each fitting is machined using aerospace-grade 6061 aluminum, then anodized for long-term durability in harsh marine conditions. A premium Viton O-ring is included and pre-installed, ensuring a tight, leak-free seal even under vibration and temperature changes. Whether you’re building a weekend lake cruiser or a competition jet boat, this fitting is designed to handle the environment.
 
Beyond the Oil Pan
 
While originally intended for remote oil drains, this M12-1.75 to -6 AN adapter has proven itself across a variety of marine and custom applications. It’s ideal for draining remote-mount oil tanks, transmission sumps, and even differential housings in custom drivetrain setups. In performance marine applications with turbocharged LS engines, it’s also used as a clean and compact turbo oil return fitting.
 
Builders also use it on test stands, engine cradles, and dyno setups—especially when prototyping or tuning LS-based marine engines. For overlanders and off-roaders using LS powerplants, it allows drain routing past skid plates or through tight chassis geometries with ease.
 
This isn’t just another import fitting. It’s proudly 100% made in the USA using high-precision CNC equipment and tight tolerance standards. Designed by enthusiasts, for builders who understand the value of time-saving, clean design—and dependable hardware.
 
Whether you're performing routine maintenance at the dock or building a high-performance watercraft from the hull up, this adapter makes servicing your LS-based powertrain easier, cleaner, and far more convenient.