mopowers said If you want to run -6 lines, all you need is the appropriate adapter fitting(s). Universal Fittings - AN to NPT Fitting - 1/2 in. NPT Fitting Size 1 (application) -6 AN Fitting Size 2 (application) - Straight Fitting Angle - adapter-fittings I would day -8 line would be way overkill. Click to expand...