Gear ratio...

[rexysky]

i wonder can we make any changes to our gear ratio?
as currently my 1.8(M) is making 100km/h @ 3k rpm 5th gear....
seems a little short.....
it would be better if can achieve 120 or above.....

 

[jinkl]

hardest way , change final drive
cheapest way, change bigger rim and tyre