Does this come with all the upper and lower o-rings for installation. Or do i need to purchase them separate?
They come with, the o-rings are already installed on the top and bottom of each injector, so there is no need to purchase separately.
Is it easy to install?Are these plug and play Injectors?
These is plug and play Injectors can be used directly as replacements.
How is its performance?
YHIDIANF performance fuel injectors provides precise control of fuel delivery & atomization for improved throttle response.
How long can it work?
Generally Speaking, If The Car Is In Good Condition And The Fuel Quality Is Good, It Can Be Done Every 40,000-60,000 Kilometers.
Are these fuel injectors clogged?
Even If The Fuel Injection Nozzle Is Slightly Clogged, You Dont Need To Be Too Nervous, Because The Impurities Can Be Sprayed And Dissolved When Accelerating At A High Gear.