The group includes fuel pipes and fuel hose in several lengths, hose clamps, copper washers and hollow screws for banjo connections, plus O-rings and injection valves. During a rebuild the hose ends are a typical checkpoint – old rubber hoses harden and leak at the clamps, and copper washers should be replaced every time a hollow screw is taken apart so the seal stays reliable.
The B27E is fuel-injected, so the injection valves and their O-rings are among the wear points when the idle becomes rough or the engine smells of gas when warm. The parts are intended for the 260 with this exact B27E and are based on the range's families of pipes, hose and sealing details.