I'm debating on whether or not to save up for some headers. I was only wanting to spend max of 650 and thats about what the JBA's are could get TRD or Downey, maybe looking for some grunt down low and a little deeper sound I guess too just a few more ponies. I've not done alot of research on the 4.0's and pro's and con's of their headers but thought I'd ask. After all I DID use the search button. Thought I'd post it here since it's for the 4.0's and not in the performance folder..