No. 5 refers to the maximum efficiency.The number 4 means high efficiency.The number 3 refers to the medium performance.The number 2 refers to the street performance.Number 1 means low efficiency.
The number five represents the most effective means No. 4 High Performance number 3 means mediocre performance second number refers to the efficient number one means less performance.
The number 5 mean effective number 4 means high efficiency number 3 means. Effective medium number 2 means efficiency fair number 1 means efficiency is low.