iSaddle Turbo Sound Exhaust Muffler Pipe Whistle Blow off valve BOV Simulator Whistler (Size S for 1000CC-1600CC) Universal fitment for all vehicles modelsDo not fit piping inlet which is more than 2.5inch size:S 17mm(Diameter) Made of high quality and light weight aluminum Easy to install, can be installed under 2 minutes Package included:1x turbo sound simulator whistle