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 kit consists of a direct fit lower assembly used in conjunction with alternative length upper lines AN-3 connections make for easy installations Assembled in the U.S.A.. LINE BRK LWR FLHT ABS POL