I tried one of the chinese front dump cannisters on one of my DLE 30 engines and I was not satisfied . It was listed for use with 26 to 30 cc engines but it didnt flow well with the 30cc . I tried all the tuning tricks to get better performance from it but ended up putting a wrap around pitts on it to get the power back. I had it setup in my Red Wing MXS-R , nice fit ,quiet , but greatly reduced the power . I pulled it all out and bench mounted the engine and pipe to play with header lengths , timing , carbs . etc ...
and never could get it to run correctly on the cannister . Installed the wrap around and reset the carb and gained 500 peak rpm and better throttle responce. But also gained more noise ....