Yes it is. And worth every penny I paid for it. I tried 5 different mufflers and none fit within the cowl until I picked up the JTEC. I drilled and tapped it for the smoke nozzle from a Bisson and threw it in our media blasting booth at work as it had a few scratched in the smooth finish. Nobody see's it inside the cowl but they bothered me Lol. I LOVE the way this thing sounds at idle. Nice deep burble. AT WOT it is certainly not quite but has an awesome sound to it. Only other thing I plan on doing is angle cutting the tips to match the fuselage.