The REDS EFRA 2113 High Power Top Speed exhaust guarantees great mid and top end power, with average fuel economy on your REDS engine. The REDS 2113 is suitable for any type of tracks. This pipe kit is specific for GT class and includes the springs and gasket required for assembly, as well as a short manifold. This pipe can also be used with a medium manifold on short tracks when you need less top speed and more bottom end torque.