Alexia's 1987 To 1997 Comanche in MJ Hardcore Tech: Epic Journeys to Greatness Posted August 22, 2014 Automatic tranny... how "often" and how "long" do you spend at five grand. I'm lucky if the tranny even lets me hit 4500rpms. Seems to work great for me and others as well. I just thought I would let you know the pulley works great and functions better than the stock pulley for around town. It still pulls 7 pounds of vacuum at 60mph and only sees boost if my foot asks it to. I'm sure your stock pulley will suit you just fine but after using both I will definitely keep the 54mm on mine. P.S. this is just my opinion not a rant. Best of luck with your project.