Cox Surestart .049 Piston, Cylinder, Throttle Custom RC Sure Start
This is an original Cox .049 piston and cylinder, 
custom fit with an exhaust restricting throttle ring.
Allows throttling an engine from maximum RPM, down to idle, and stall.
Works with most Cox .049/.051 engines.

Video here, https://www.youtube.com/watch?v=gtw8nqJHGfQ

Please look at my other sales.

If you're buying multiple items, just go ahead and pay the full amount. 
I will pack it all together and send it, then send you a refund for the shipping overcharge.

Thanks for looking!