Hi, someone want to sell me some obd2 290cc injector but they seem be exactly like my obd2 240cc. Is it possible to differency the 290cc ? the guys say there is a blue dot on his injector. Is all the 290cc injector have a blue dot on them ?

Thanks

 

what is differency , the only way to tell the difference is to flow test them

to answer your post question
Is there a difference between 240cc and 290cc/ of course 50cc diff

 

Visual difference man.

 

My 290 cc was with a white dot on each injector.