Sure they are.....
Fram makes Fram.
Purolator makes Purolator.
Fram also makes : Pennzoil, Penske, Castrol, & Quaker State oil filters are made by Fram.
K&N filters are made by Hi-Flo
Hastings (marketed as AMS), and Champion (marketed as Mobil 1 and Bosch) are made by Purolator.
This is my source. - http://motorcycleinfo.calsci.com/Filters.html
What is yours?
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