bro D7zul..
yes i did on my car now with Apexi GT setup... perfect match with Apexi Exhaust control valve.
ihiihiiihihihihihihi...
Last time i using stock 1.x inch ori seg local piping with AT BLACKTOP can go up to 200kmh smoothly.[/QUOT
my car also.....but the 6th gear doesnt show his power...i will try to change the diameter next month to see how does it's work..hehe