The free delivery seemed a bit too good to be true when I first saw it, so I ordered a PS-2010 for $8.99 and and received it.
Repco sells K&N PS range for $10.49, at least the ones I can see that fit my family's cars.
Precision International have listed the Ryco equivalent part numbers so you could look them up on Supercheap Auto for price and fitment comparison. If Supercheap also shows a compatible K&N Performance Gold HP-series part, the Performance Silver PS-series equivalent has the same numbers following.
I'd recommend cross referencing OEM part numbers: https://www.oilfilter-crossreference.com/
Then cross check the datasheets for dimensions and threading on the K&N website against the Ryco site to guarantee correct fitment.
About double the price as compared to factory. So a good deal! Unsure if the quality is in them. Definitely trading on the name here. I have no doubt they are up to standard but certainly not performance filters by any means. A plus from me though due to price.