I HAVE SEVERAL WEEKS THAT MY Z8 DOES NOT GIVE ME MORE THAN 65 MILES PER HOUR IN 6000 RMP, MONTHS AGO I CAN GET AROUND 68 AND 70 MILES PER HOUR WITH 7500 APROX.
I APPRECIATE THE HELP TO FIGURING OUT WHERE TO STAR LOOKING THE FAILURE.
IT HAS NO MODIFICACION, IN THE CLUTCH AND IN THE ENGINE. IS STOCK
THANKS