USED THERMAL SWITCH FOR HOT START SYSTEM, SEE ILLUSTRATION #16, FITS 1992-1996 XJS WITH V12 5.3 OR 6.0 FROM VIN 179737 ON. Screw in male threads on one end and 2 male electrical connectors on other end. This flushes cool fuel through the fuel rail during a hot start It prevents hard starting due to vapor lock. NLA (DAC10335)