WTF

anyone ever checked out these go kart racing parts shops online or local? i ended up finding the perfect air filter for my turbo, a k&n style one for like $7 and i noticed they sell aluminum catch cans for like $15, and other useful crap, im not sure how well the catch cans would work, anyone tried these?

like these
http://www.out2win.com/catalog/raptorbreather.html

some have breathers on them like the kind they sell at summit for twice as much and look kinda the same