What is the pinout on my K F455P 7An filter?
It looks like a Kyocera part. I found the following datasheet for Kyocera KBF455P. It has a 7 Amp version which is what this would be. http://www.mouser.com/ds/2/40/avx_kbf-322461.pdf 

Took a bit to find since it's an obsolete part. Pinout is on the first page of the datasheet, also inserted below (as shown pin 2 is the bottom center pin, pin 3 is above it to the right a bit):