Turbo Sound Whistle Muffler Exhaust Pipe Valve BOV Simulator L For BMW Audi Volkswagen Chevrolet Silver Package includes: 1 x Turbo Sound Simulator Whistle + Set of Mounting Tools Size: Length: 4.38" (11cm) Diameter: 1.19" (3cm) | Thread Diameter: 6mm | Thread Length: 1cm Tail Pipe diameter : 44-55 | Size Type: L | Displacement : 2000-2400cc Color: Silver | Material: Aluminum Fit Most Automotive, Car, Vehicle with exhaust pipe diameter within 2.5" round.