hello dude , mi name is Andres im from chile, i have a 2011 ram 5.7 reg cab sport, (afe 2 intake, mufflex 14 and hemifever tune), i want put a set of arh long tube headers..... im from chile so i need some advice... where u buy the headers? ur happy with them??? , u notice an improvement in aceleration? , u recomend the 1 1/4 or the 1 7/8?? .... if i get he headers im doing a new custom map with sean... but its its a big investem for me 1600 the headers + 1000 shipping to chile = 2600 + 125 ustom map, almost 3 grands! ... u think it worth it??