hey guys quick question about exhaust. i have an 06 5.4 which i took the muffler off and replaced with straight pipe. it lasted for about 3 years and recently my weld broke so i just kept the tail pipe off because i liked the new interior and exterior sound haha. so basically my exhaust now is stock piping with both cats with about 2 feet of pipe after my Y pipe and thats it. am i loosing any power with this setup? also i was thinking about doing dual straight pipes and wonder what the advantage of an X pipe is? any info would be great, thanks guys.