Service servo la. Then change to GSR front brakes. That's plenty already. No point upgrading to a larger servo unless you're racing a lot. Larger servo will make the braking very sensitive and to the average joe you might end up jamming the brakes a lot.

service kit cost about 120. labour maybe 60.
buying halfcut maybe same price, but donno the condition of those halfcut.
Better service and renew it. Last for at least 5-7 years. Wira samor easy and cheaper to find parts compare to VR4, evo, etc

I have done serviced myvi brake pump. cost rm60 for the oring kit. But only last for not more than 2 years. I guess, the cylinder wall of the master pump also tear away. Then changed it with brand new master pump cost rm200.
Braking is too sensitive. Just need to press brake pedal a bit only.
hi bros, any recomendation to upgrade the brakes on my wira?
servo showing signs of wear and tear, just buy new?