-4AN Male Banjo Fitting 12mm x 1.5 Metric; Alumi

The -4AN Male Banjo Fitting 12mm x 1.5 Metric in Aluminum from Vibrant Performance is a precision hydraulic adapter engineered for high-performance fuel systems, cooling circuits, and pressurized fluid applications. This banjo-style connector serves as the critical interface between metric-threaded ports and AN-standard hose lines, making it essential for engine builders, performance technicians, and motorsport enthusiasts who demand reliable, leak-free connections under demanding conditions.

Constructed from lightweight aluminum and finished in black anodized coating, this fitting combines corrosion resistance with minimal weight penalty—critical factors in competitive and street-performance builds. The banjo design incorporates a 12mm x 1.5 metric male thread on one end and a -4 AN male port on the other, with integrated crush-washer technology that ensures a positive seal without requiring thread-locking compounds. The 1.5 metric pitch threads conform to ISO standard specifications, allowing seamless integration with metric-equipped engine blocks, cylinder heads, and OEM component galleries where fuel or coolant flow must be redirected to aftermarket systems.

This adapter excels in turbocharged and supercharged engine builds, custom fuel-injection retrofits, and auxiliary cooling-system installations where metric engine ports must connect to braided stainless-steel or rubber AN hose lines. Professionals and serious enthusiasts rely on Vibrant Performance banjo fittings for their dimensional accuracy, burst-pressure rating, and repeatability across multiple builds. The supplied crush washer ensures single-use, pressure-tight assembly; replacement washers are widely available for reinstallation or service scenarios.