300km/hr .......FC3S, 13B turbo?
Depends on personal preference lah...
When I drove my NF 2.4 Sonata, I was doing between 200 ~ 240 km/h and made it from JB to Malacca shy of an hour.
Used to make it between 30 ~ 45 minutes when I was driving my FC around 250 ~ 300 km/h.
190km/h is pretty easy on the NS highway, but my guess is he'll be driving a Cat B car.