"what is the part # for the air hi flo filter, for the oil filter it is hf 566"
De dee, there isn't a part number, I got the foam pad from a British company called Ramair, I paid £9.98 for a sheet 600mm x 400mm, enough for 3 filters!
I cut out the paper element from the original, then drew an outline around the entire filter, and cut it out, I left an extra 3or 4mm around the edge, made holes for the bolts and screwed it back together.
I know its sealed because the foam is tight around the original paper element hole.
And today I am doing a mini service, changing oil (5w50 fully synthetic) filter (HF566) and gear oil (75w90 fully synthetic)
Cheers,
Don