Originally Posted by Tibbys96Z

I wouldn't expect to "feel" a difference after a header only install. I bet you would see a difference in your track times though. I don't think an LT4 knock module would do you much good either. You should get it scanned to see what some of the sensors are reading. Probably even do a few dyno pulls. Extreme Performance in OKC can hook you up on the above 405-721-2430