HRC Racing is proud to announce the release of its Exhaust Pipe with Smoke Generator & LED Unit Set. This system is remote controlled in parallel to the ESC via the throttle channel. It manage the amount of smoke as well as the LED light included in the exhaust pipe. Important: replacement fluid is also available separately. HRC25031A – Exhaust Pipe with Smoke Generator & LED Unit Set HRC25031B – Replacement fluid for HRC25031A Available now ! Source (HRC): http://blog.hrcdistribution.com/?p=5438