Ported Stihl ms440 build

Ported and assembled a Stihl ms440 today. Saw is all oem except a meteor piston. Saw runs pretty good so far, but it needs a way more opened up exhaust and some run time. Ran it with a stock exhaust with a slightly opened up exit hole in this video. It needs more flow thats for sure. Will retest with a modded muffler. Thanks for watching!!