function dodajfele1(player)
local auto = getPedOccupiedVehicle(player)
local handling = getVehicleHandling(auto)
setVehicleHandling(auto, "maxVelocity", handling + 20.0)
outputChatBox("Zamontowa?e? Nowy silnik")
end
addEvent("felgi1", true)
addEventHandler("felgi1", getRootElement(), dodajfele1)
Help ME 
!