Yes, they are definitely the same muffler....I have both. And yes, these guys are right, the Tower Hobbies muffler also fits, and is a much cheaper alternative ($14 or $15 I think). I changed the muffler on my Phoenix Sukhoi with a TT Pro .46 from stock to the Tower muffler, and although I didn't measure the RPM gain, I did notice a performance gain. I'm thinking of putting a Tower muffler on my Ultra Stick .40 with a TT Pro .46 also.