HI, I'M RUNNING A STAGE 3 GARRET, HARVY GIBBS TOP END, MONGOOSE EXHAUST, FRONT MOUNT INTERCOOLER, SWITABLE BOOST CHIP (15PSI ON HI BOOST).
MY RS GOES OF THE CLOCK AT 5000 RPM AND THE LIMITER IS JUST OVER 6 SO WHATS THE ROUGH TOP SPEED? MY MATE RECKONS HIS 180BHP ASTRA GSI DOES 140 AND I WAS STILL PULLING FROM HIM.