i have 15'' msw's and a fifth gear conversion. before i did the 5th, i'd get a vibration in the high 70mph's range. after i hit 80mph and on, it would be smooth sailing. after the 5th, that vibration range moved into the low 80's. go figure. -- To subscribe or unsubscribe, send email to scirocco-l-request@privateI.com, with your request (subscribe, unsubscribe) in the BODY of the message.