If all you have is headers...not really. You will notice a little more bottom end, but nothing to break your neck against the back of the seat. JBA however is the best quality header to buy in my opinion. I have a 94 Z71, friends have from 92-98 (5 in total) and we all have them. Easy install, the egr tube that goes around the back is kinda a pain though. On the dyno about 20hp. actual feel, about 10.