What is the difference between TNT Pro purge and normal one?
TNT has two purges on there website, a Pro purge and a normal one... What is the difference? Also how do I tell if I have -4 or -6an? I have the normal TNT F1 Power ring kit.
The solenoids are exactly the same, the only difference is the line adapter. -6an for the Pro and -4an for the stangard.

