NEW HERE AND JUST ABOUT FINISHED MY 99 XJR. JUST PORTED THE SUPPER CHARGER AND CHANGED THE GEARING FOR 17PSI OF BOOST. MADE A CUSTOM X PIPE AND GOING TO INSTALL 50-75 SHOT OF NITROS. I HAVE WORKED FOR THE JAGUAR DEALER FOR THE LAST 10 YEARS AND OPEND MY OWN SHOP THIS YEAR. PASADENA MOTOR CARS. ANY QUESTIONS, GIVE US A CALL. pasadenamotorcars.com