Compared to the Straight Shot, the Barf Box is a joke. Many just fall apart. Jason's stuff is made of stainless steel and will outlive the saw. It is very loud, but that is irrelevant, because if you cut without ear protection, you are a fool. The SS is dyno-proven to give an increase in power. It is a muffler mod on steroids. I mod my own mufflers, but decided to put the SS on my 400. Holy crap that thing cuts and the throttle response is amazing. It rocks a 25-inch bar, just as well as the 20-inch.
Anything that you do to a 362 is better than nothing. Even with a muffler mod, mine(a standard carb) is a pig, compared to the 400.