should i buy after market injectors yes or no?
The answer is no...but why would you be buying them?? If you think they will make the engine faster.....they won't. Putting more gas in with no other changes will not make more power. Period. There is no magic in the injectors...they just meter the fuel into the engine....the OEM injectors meter the correct amount and adding to that will not make more power....in fact, it will make less as the engine will be over-rich. If you think you need replacement injectors due to a sticking or failed injector then use the OEM injectors....they are matched precisely for the system...ESPECIALLY if you only replace one or two injectors...they need to match the rest of the injectors in the system precisely.