4an Male Clutch Line Adapter Fitting Ford/GM

The 4AN male clutch line adapter fitting for Ford and GM vehicles is an essential component for custom hydraulic clutch systems, aftermarket clutch conversions, and performance transmission builds. Whether you're upgrading a fox-body Mustang, LS-swapping a classic platform, or installing a modern modular clutch master cylinder into an older machine, this adapter bridges the gap between modern -4 AN hose standards and factory clutch line ports. Fabricators, drag racers, and weekend warriors rely on quality adapters like this to maintain leak-free, reliable clutch actuation under sustained heat and pressure cycles.

Manufactured by EARLS—a trusted name in high-performance fluid systems—this male adapter fitting is precision-engineered to accept -4 AN hose barbs or push-to-connect fittings while threading into OEM clutch system ports on Ford and GM engines and transmissions. The compact 2.8 x 0.6 x 3.8 inch form factor fits tight engine bays without interference, and the minimal 0.05 lb weight contributes nothing to unsprung mass. EARLS' reputation for consistent threads, smooth internal passages, and corrosion-resistant finishes ensures that clutch feel remains responsive and that repeated pressure cycles—typical in street, strip, and road-race duty—don't degrade performance or cause gradual seepage.

Enthusiasts performing engine swaps, installing adjustable clutch master cylinders, or routing custom braided stainless steel clutch lines will find this adapter indispensable for achieving a clean, professional installation. It suits both hydraulic and cable-to-hydraulic conversion projects, making it a go-to choice for street rods, vintage race cars, and modern performance platforms. Installation is straightforward—simply thread the fitting into the OEM port and connect your -4 AN hose—though proper torque specification and thread-seal compound use are recommended to prevent weeping. Verify Ford or GM application and port thread size before purchase to confirm compatibility with your specific engine and transmission combination.