Chainsaw Repair

OK, got the serial #.
2011 1900083

So I assume yr of manf 2011?

660mag mentioned removing the cat from the muffler.  What's involved in this?  How much performance increase do you see?

This will be primarily a firewood saw.  I love my 026 but I like a little more bar (it's 20").  I need to stick a chain on the 2159 before I get serious, but it sure balances nice with the 24" bar.  Think I'm going to like it, just wish we had a local dealer.  Closest one I know of is almost 200 miles away.