I am getting a 4 stroke as 2 strokes are basically outlawed in California. The only 4 stroke 49cc engine that I know is for sure is legal in California is the one sold at phantombikes.com. I want to make it have a flowmaster sound come from the exhaust. Could this be done? or are 49cc 4 strokes unable to produce this exhaust sound? I am using a GT Dyno Deuce for my build and I think flowmaster style exhaust noise would sound very cool on that bike.