youre gonna hate yourself if you order OBX headers. they dont fit. everyone is recently going for speed daddy headers.

they are not the same as radix pulleys. rent the pulley puller from ZZP, it's the easiest way. get their pulley system as well.

if you get headers they come with a downpipe.

now, if you really want to go there, tell us how much money youre willing to spend and how much power youre looking to produce in the end. we can give great recommendations on a parts list to shoot for.