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F3D Exhaust Throttle

F3D Exhaust Throttle

Ideal for throttling any non throttled Pylon racing engine during start up prior to race start. Helps keep the engine and pipe cool while waiting for the clock to count down. The alternative to adjusting the needle or closing down the intake with a finger so close to a spinning prop. Simply hold the Exhaust Throttle over the muffler tail pipe until ready to launch.

Made from wood dowl for heat insulation to keep your fingers cool.


  • On an F3D MB40 engine we are looking at about 10,000 RPM reduction so about 19,000 RPM with the restrictor in place

  • F3D motor -
    What rpm decrease when choking the pipe with this?


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