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Dubro Super Smoker Valve
If you want smoke for Air show realism this is the gadget. Servo operated no leak valve allows paraffin under crankcase pressure to be injected into the muffler to produce white smoke in billows. A positive, no leak fuel and pressure shutoff valve. Compact enough to mount anywhere. Requires one extra servo to operate. Assembled with 34″ of neoprene fuel tubing and hardware.