Only the front seats, rest will remain standard HK GTS. When you pull the headrests off the seats are low and from outside will look good. If you were to put sheepskin covers on too you wouldn't know they were actually different at first glance. I needed coupe seats with the flip down rear, hard to get these in plain black, they are normally all g@y looking colours. Astra convertible are straight red or black as well, but are a bit small for you or I Gene. I've driven my V2 with the same seats for 500kM straight and get out feeling good. After 5kM on original HK GTS seats you are feeling sore.
The V2 seats also motor forward when you tilt the seat, which is good.