The REDS EFRA 2143 High Torque exhaust for S Series guarantees great mid and top end power, with average fuel economy on your REDS engine. The REDS 2113 is suitable for short tracks. The pipe kit includes the springs and gasket required for assembly, as well as a medium manifold. This pipe can also be used with a long manifold on short tracks when you need less top speed and more bottom end torque.