A/C Compressor, Remanufactured, With Clutch. FITS 1987 Series III XJ6 From VIN 471857 On & 1987-1992 5.3 V12 XJS From VIN 136646 On, That Do NOT Have DAC3374 Thermal Fuse or A Superheat Switch. Ports Are on back cover for Hslp switch and relief valve. Always Replace The Receiver Drier When Installing A New Compressor! Compatible with both R12 and the new R134a. Includes a new clutch. NLA Please Contact Us For Info! (JAG405RB)