hey what can i do next to my car it is an ef xr6 manual it already has k and n panel filter, 2 1/2 inch exhaust cat back i was thinkin maybe cam, extractors and j3 chip can some body give me some prices and some advice on what will be the most noticeable cheers

mate use the search theres heaps on this...someone asks this atleast once a week

http://www.fordmods.com/ford-4l-and-6-cylinder-f1/3-9l-4-0l-inline-6-modification-guide-t66.html