Chainsaw Repair

After just a little test session (just goofing off in small round)  The DP = Dual Port wide open with large side exhaust hole muffler 440 is going to be hard to beat with the stock mufflers on the 445 372.  Heck my 445 still has the spark screen in too  cant believe I did that. 

Just seat of the pants feel in the cut. No timing was used.   This 440 cant be how other 044 440 runs could it ( four stroking to 13.7K). This thing impresses me that much.