Review on 🚗 Dewhel Universal Aluminum Turbo Sound Exhaust Muffler Pipe Whistle Car Blow off valve BOV Tip Simulator Whistler - XL-Black: Enhancing Your Car's Sound Performance by Matthew Aiono

Sorry. I hate leaving bad reviews and I never did. But when a product doesn't work as advertised, a man should do what a man should do. When the package arrived, everything was delayed. The device came without a set screw and two parts of the whistle were loose. I've tried just blowing into it. worked fine Tried on multiple machines. Tried 4, 6 and 8 cylinders. Even 2 cycles. Nothing. no noise I noticed that after removing it, even if I blew it until it cooled, it didn't work. so the heat prevents him from working? Sounds like a real design flaw with something you're sticking in a hot exhaust! sorry seller.