The prices range from $35-80 depending on size. Here's the small one I run: http://www.summitracing.com/parts/FTM-SS300/. Some may think it wouldn't do much, but cut open your filter after using one and you'll be amazed(or at least I was). They really work wonders on Flat Tappet cam engines.

 

nitrous keeps my plugs clean

cant believe ive never heard of this magnet thing. i may give it a try and see what i find in my filter.

 

I meant our drain plugs goober