Slip-On Fitting 12AN x 1-3/8in

The Slip-On Fitting 12AN x 1-3/8in from KEVKO Oil Pans & Components is a precision hose adapter engineered for serious engine builders and performance enthusiasts who demand reliable fluid transfer in high-flow cooling and lubrication systems. This fitting serves as a critical junction point in custom oil pan installations, remote oil cooler setups, and modified engine bay plumbing where standard factory connections fall short. Whether you're upgrading to a dry-sump system, routing synthetic oil through an external cooler, or building a complete custom cooling loop, this 12AN slip-on adapter provides the dependable connection modern performance applications require.

Designed with a 12AN bore and 1-3/8-inch slip-on body, this fitting accommodates standard 12AN hose barbs and is sized for clean integration into larger displacement and turbocharged engine packages where flow rates exceed what smaller adapters can handle. The slip-on design eliminates the need for complex swaging or compression fittings in tight spaces, streamlining installation while maintaining system integrity under pressure. Weighing just 0.24 lbs and measuring 2.95 x 1.75 x 4.35 inches, it occupies minimal footprint in congested engine compartments typical of race cars, restomod builds, and heavily modified street machines. KEVKO's reputation in aftermarket oil pan engineering ensures this fitting meets the durability standards expected in race-proven systems.

This adapter is ideal for fabricators building custom cooling circuits, experienced mechanics upgrading oil circulation on high-horsepower engines, and restorers installing modern oiling solutions in vintage platforms. The 12AN specification is particularly suited to LS-based engines, big-block builds, and supercharged or turbocharged platforms where stock cooling inadequacies threaten reliability. Installation is straightforward for anyone familiar with push-lock hose connections; simply slide the barbed end of compatible 12AN hose over the fitting body and secure with a stainless-steel hose clamp. Verify compatibility with your specific hose inside diameter and confirm fitting placement does not interfere with accessory belts or moving components before final assembly.