Aluminum Turbo Sound Whistle Exhaust Muffler Simulator Pipe Blow-Off Valve Purple S/M/L/XLSpecification:-Material: Light weight aluminum-Color: Purple-Quantity: 1 pc-Size: S/M/L/XLSize: SLength: 10.2cmfits the car:Tail Pipediameter :32-43mmDisplacement: 1000-1600ccSize: MLength: 10.5cmTail Pipediameter :37-48mmDisplacement:1600-2000ccSize:LLength:11cmfits the car:Tail Pipediameter :44-55mmDisplacement :2000-2400ccSize:XLLength: 12cmfits the car:Tail Pipediameter:56-85mmDisplacement: 2400+ccFeature:- Made of light weight aluminum Machined from 6061 T-6 Aluminum- 1 muffler tip for best effect- Install on Aftermarket muffler, Catback, Axleback muffler it will not produce any sound.- Easy installation- Universal fits for most cars w/ A STRAIGHT OEM Muffler Exhaust, doesnt fit the ELBOW muffer.Installation:1. Loosen the screw on the Turbo Sound Whistle2. Place the Turbo Sound Whistle body inside the exhaust muffler with the larger opening facing the inside of the muffler3. Screw the screws on the Turbo Sound Whistle to tighten the item so it doesnt fall off while drivingPackage includes:1 x Turbo Sound Whistle