About two weeks ago i installed my JWT S3's and they didnt seem to make much of a difference, there is a little difference and the biggest was that i do feel it pull better towards redline and not drop off in power in the last 500rpms. but as far as time wise. it only took .1 of my 0-60 and i went to the track but i wasnt doing very good traction wise and my i had other issues too. but i figure the way it is now it would take a tenth of my 1/4 too and maybee 1mph. but i was told it was going to be because of my really oldschool header i have on there. So i went ahead and ordered an obx header. im going to do that work to the flanges to make it alot smoother flow. but yeah i know thats going to help alot especially with the cams. im hoping to hit at least 14.0 maybe better. but i know for a fact that this header i have on here is what is restricting it. its not that good of a design and the primaries are small. The way it is now i could run a [email protected] but i was expecting the cams to make a big difference but i wasnt sure because of the header. It did make my exhaust tone alot deeper and better sounding and a nice little lumpy idle which i love and everyone says sounds really mean. but we will see performance wise when i get the new header on. What is everyones imput on it.