If replacing the stock lower brake line assembly on '18+ dual disc Softails, an adapter is NOT needed. Using AN-3 fittings, the upper line connects directly to the Magnum lower assembly
Brake lines are constructed with PTFE inner tubing, DuPont™ Kevlar® aramid fiber, premium Signature Magnum braids and an outer PVC jacket to greatly reduce line expansion
Manufactured with an enhanced construction designed to be compatible with Harley-Davidson ABS/non-ABS requirements for stock and alternate length brake lines
Brake kits consist of a direct fit lower assembly used in conjunction with alternative length upper lines