I've got a 026 i've had for a longgggggggggg time, it is all stock. Found out the ears on the hold down tabs on the muffler were broken, so, got a different muffler. The one i got, did NOT have a aggressive baffle in it. Might be just me, but, i swear its got more power, or maybe its just in my head, since it is louder. yes i wear ear plugs. But, for sure, 2 totally different designs inside the muffler. Either way, its still a great saw.