I went with Fine Lines in non stainless for my 6 pack and all my fuel and brake lines, no leaks....took a few tries at my OE distribution block(pdb) to get it sealed using DOT5 fluid, but got it, as stated correct wrenches are a must, no galling, no slips and no scratches...no grease or teflon used either btw, just be careful and take your time and don't gorilla the fittings