I found the K&N Filter in the Camping World catalog. For the Ford PSD, it's SKU 18597, at $43.19 for members. Page 218 in the 2002 Master catalog. Roger Hightower WBCCI 4165, VAC, TCT 1975 31' Sovereign, '02 F-250 PSD Mesa, AZ mailto:n7kt@att.net