so i just changed my injectors O rings and went out to do a pull (i just use the car for fun, mainly for night pulls), after 5500 i had a 'vtec like' noise from the engine..now it runs better and didnt lost power after that noise but im not sure about it..is it that it has more power now?
thnaks!

 

pics of motor. why did you change orings?
no tags and insurance on it lol