vids say it all.
http://cgi.ebay.com/ebaymotors/Saber-Fake-Turbo-Blow-Off-Valve-Sound-Simulator-Sunami_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1171Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem23016e3182QQitemZ150347854210QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
http://cgi.ebay.com/ebaymotors/Saber-Fake-Turbo-Blow-Off-Valve-Sound-Simulator-Sunami_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1171Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem23016e3182QQitemZ150347854210QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories