The new REDLINE SMOOTHY PIPE(#9725) is special designed to fit with the Thunder Tiger RL-53H helicopter engine. Features enlarged exhaust volume, with smooth airflow to help the engine generate extreme power output and high torque at high RPM. Steady backpressure flow design to make the engine run smoothly under different RPM conditions.

Fit with RL-53H engine,#9725 SMOOTHY PIPE will perform with linear response to throttle inputs while providing high power output. Smoothy pipe will be suitable for the F3C pilot.