This is the REDS Engines 3.5cc Long Off-Road Manifold. This manifold is ideal for the R Series REDS Engines 3.5cc .21 nitro engines. Package includes one gasket, one long spring and two short springs. This manifold will provide very high torque over high speed.
REDS Long Manifold Off-road Medium Single Bend (L) Models available: M (Medium) is recommended for short tracks where more bottom torque is required, top speed will be lower. S (Short) is recommended for medium or standard tracks; it is a good compromise between torque and top speed. XS (Extra Short) is recommended for tracks with long main straights and to achieve the highest top speed but lower bottom torque.