OEM-specification fuel tank cap engineered for Ford Mustang models from 1997 to 2007, compatible with 3.8L, 3.9L, and 4.6L gasoline engines. This critical component maintains optimal fuel system pressure whilst preventing vapour leakage, directly enhancing engine performance and fuel economy across all compatible powerplants. The precision-machined locking mechanism provides secure fuel containment and guards against contamination during operation. Manufactured to exacting Ford standards for drop-in installation without modification. An essential replacement part for Mustang enthusiasts prioritising fuel system integrity and emissions compliance.