_x000D_ Specifications: Made of light weight aluminum muffler tip for best effect. Install on aftermarket muffler, catback, axleback muffler it will not produce any sound. Easy installation and use. Universal fits for most cars, doesn't fit the elbow muffler. Installation: Loosen the screw on the turbo sound whistle. Place the turbo sound whistle body inside the exhaust muffler with the larger opening facing the inside of the muffler. Screw the screws on the turbo sound whistle to tighten the item so it doesn't fall off while driving. Type: Turbo Sound Simulator Whistle Material: Aluminum Quantity: 1 Pc Color: Black Features: Useful, Easy to Install, Simulator Size Details [Our Size S] Fits Car Tail Pipe Diameter: 32mm - 43mm/1.26" - 1.69", Displacement: 1000-1600cc (Approx.) [Our Size M] Fits Car Tail Pipe Diameter: 37mm - 48mm/1.46" - 1.89", Displacement: 1600-2000cc (Approx.) [Our Size L] Fits Car Tail Pipe Diameter: 44mm - 55mm/1.73" - 2.17", Displacement: 2000-2400cc (Approx.) [Our Size XL] Fits Car Tail Pipe Diameter: 56mm - 85mm/2.20" - 3.35", Displacement: 2400+cc (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Turbo Sound Simulator Whistle _x000D_