Any of the 028 series cylinders will bolt onto your saw. The old pre-chainbrake saw was 2.8 HP, the Wood Boss was 3.0 HP, and the Super was 3.1 HP. I can't tell much difference from one to another. Be careful if you get an 028 Super cylinder- I believe the exhaust port dimensions are larger and the smaller mufflers may not fit. The 028 is a wonderful old saw. That said, it is dreadfully inefficient as far as the scavenging of the fuel in and out of the cylinder. I have heard that as much as 25% of the fuel that goes in comes out the muffler unburned due to scavenging losses. The newer 4-port saws are much "cleaner". But the 028 is still a superb quality saw.