6. Something we figured out after we already had the brakes together was that some factory brake lines have a lip that will not allow them to be installed on the Raptor caliper assemblies. Aftermarket brake lines will not give you this issue, but if you're cheap like us and the brake lines still look good, then just get out a grinder and take a little ribbing off of the caliper right next to the hose inlet. You don't have to be exact or anything here. As long as the brake hose end gets a flat and proper seating on the caliper, you should be in business.