FordPartsGiant.com offers the wholesale prices for genuine 2021 Ford Police Interceptor Utility parts. Parts like Wiring Harness are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L FLEX, 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV).