I like the system one oilfilter, especially if you do something stupid at the track, you can check your motor right there without worrying about cutting open a filter just screws apart. i usually blow out with air hose then dawn and water blow out again until dry then back on i did order 2 screens when i purchased mine so i would have a spare.
I've used True Filter and PurePower. Both billet aluminum case with mesh cartridge. Wouldn't have it any other way. Get a can of stoddard solvent to clean them in. You can do several cleanings in a large coffee can full of stoddard solvent.