Just changed to 205/50 Michelin PS3 and drove all the way from KL to Penang for a test.
Grip has improved, cornering capability has improved, even tyre noise has been softened, only thing that become worse is the fuel consumption.

even outside you can get honda brake pads at a cheaper price + workmanship.
changing brake pad is a 10 min job for most mechanics.

Just stick some big-d, small-d, p shaped rubber around the door/bonnet/trunk and it does feel much quieter in the cabin, hardly any wind noise when driving above 100 km/h.

stick it ownself. just need to buy the rubber which comes with 3m tape.
quite satisfied with the outcome.
however, it only cut down the wind noise, noise from the tyres and road is still quite bad.

Proper soundproofing will make the car so much heavier.
Last time when I did the sound proofing to the car boot, it added approx 20 kg to the car weight.
Door + floor I guess will add at least 50 kg more.

I bought it from lelong

Anyone plan to install supercharger on their NHC?

If higher torque can be achieved in lower RPM, I think fuel consumption will also be lower?

not that i know of.
using full syn and often miss the service date by 1 month.
but mileage is still short of 5k.