Lots of brushes out there to clean things but which ones do I use to clean oil passages and such? I dont want to buy a kit of 6 and only be able to use one. Need some experienced help here to get 1 or 2 (if thats all I need) correct sizes.

Thanks

 

http://www.summitracing.com/parts/mor-61820

 

I use gun cleaning brushes. Sturdy, and I already own a bunch of them.