1pc Large Universal Turbo Sound Noise Exhaust Muffler Pipe Whistle Fake Blow off valve BOV Simulator Whistler

Installation: 

1. Loosen the screw on the Turbo Sound Whistle 
2. Place the Turbo Sound Whistle body inside the exhaust muffler with the larger opening facing the inside of the muffler 
3. Screw the screws on the Turbo Sound Whistle to tighten the item so it doesn't fall off while driving 
4. Professional installation is always recommended. 

Notes: 

1. This turbo sound is not suitable for extremely curved pipes if the curvature is minor, the fitting bracket may be slightly curved to match the tailpipe. 
2.Not suitable for pipes having a smaller or bigger diameter than 44mm to 55mm. 
3. For tailpipes with a deflected outlet, it might be necessary to modify slightly the shape to allow installation. 
4. Prior to the purchase and installation, please make sure that the interior of the tailpipe is suitable and sufficiently long(11-12cm) to contain the turbo sound device. 
5. Periodically (after 500-800km) check and re-tighten the bolt and lock nut.