1\16 cox powered rc 4x4 traked truck

Voilà is the result of m'y trottle valve control modification i like m'y new desing wil fit on one of m'y exaust collector manifold wit the valve redirection of exaust in the two litle exaust pipe on the truck ad scale look wit réalisme and bether performance sound i hope it work bether than the exaust ring part Not finish it work like the cox gtp egr valve without the back presure return To ventury i have found wit oil wil Find its way To the screen inside the ventury make the engine To ritch after brake in corner dont want To get the screen of the back plate hope it wil work like a tuned pipe from m'y test inside that litle tube made like sort of cone conical chape inside size of the .061 pipe y hope it help for power rpm noise y am just scared that  trottle response wil change its driving behavior like or To fast To slow wit no mid range
The coper tube is To make the chim for the fixation of the parts on the cab of the truck
Behind the gear in the midle