i just tried the 5.9 update on mine and yes huge difference alot smoother on first gear
car feels alot stronger.
huge noticeable differences when letting off the throttle is not as harsh from stock
When letting off the gas is a huge harsh feeling that you let get when letting off the gas if that makes any sense
Also the braappp sound after letting off the gas that's also a noticeable thing is not as harsh from stock witch I personally love
I love the huge brappp sound after letting off the gas or in between gears
other than shit feels amazing and stong af