Something I whipped up for the 98+ Ranger guys:

http://www.cardomain.com/member_pages/view_page.pl?page_id=287242&page=4

...nad the silencer is different between the 3.0L and the 4.0L (unsure about the 2.3), so that is another option as well. Use the 4.0L Silencer on a 3.0L for increased air with less noise (if that is ever an issue :E ).