i just got my bassani x pipe catted and my 3.73 's i floored it for the first time today (scared of cops) dont want my license gone again.....but damn before with my 3.27's it would do a little chirp......this SOB pulls like no other and chirps like 3 times harder and it still pulls!!!!!!! im happy with my 3.73's and i can imagine what 4.10's would do