Hi guys I have a 99 2500 LWB 5.9 and I am about to do a bit off an overhaul underside and would like to replace the brake pipes but before I remove them I want to have the replacement parts to hand, but over here in Scotland I dont know which thread and diameter I need. I am guessing 3/8 something but which thread? Thanks in advance from the Scottish Ram owner!

 

The only real way to be sure is to remove the ones you want to replace, and take them to a parts store and match them for length, diameter and thread size.