Combination kit includes tuned pipe and manifold for 50 class Heli engines. Specific for Raptor Frame or other plastic frames. - The pipe includes silicone anti vibration mounting supports. The pipe is designed around the Novarossi VRS (Volume Resonance System) which provides 3 expansion chambers for tuned pipe performance. Practical RPM range is 17
RX-50357-357 H5 Pipe and Manifold for R57HR3D and other .50 - .60 engines.