SPOON SPORTS Exhaust B-pipe. The Spoon exhaust b-pipe is designed in conjunction with the Spoon manifold and back box to provide the most ideal exhaust flow while also reducing weight. The forward position of the silencer provides higher exhaust gas temperature to increase catalyser efficiency and a higher silencing effect. An internal diameter of 60.5 mm has been selected to work with the displacement of the vehicle. Whist it is possible to increase the power output and torque the weight saving is also of great benefit over an OEM Honda B-pipe. Can be used in conjunction with the Spoon N1 Back Box silencer or the factory muffler. This exhaust is for use with the Honda Integra DC5 and Civic EP3.