RE: Jett In cowl muffer arrived
not trying to be negative but I think that engine will get very hot with that set up. here some pics of mine. I would check the temp with cowl off for first flight and then with cowl on to see how warm its getting. thats an expensive engine and you dont want to burn it up. I know my set up will not work for yours. I can also tell you the exit needs to be atleast twice the size of the intake. the exit need to be unrestricted too.