I heard of some underdrive pulleys that also shave significant weight off rotating mass, just wondering which ones they were, also one of the bolts that hold the ram air box's upper and lower parts together is stuck and WILL NOT back out, I have a new lower box so all I need to do is remove teh lower one adn somehow get the crew out, only way I can think of is machine the head of the bolt off but I cant damage the top part of the box so before I go and try that I just want to make sure there is no easier way of doing it... Thanks

 

mmm anyone?

 

TTT

 

Practically any UD pulley will 'shave significant weight off rotating mass.' If it's one of your first mods, I wouldn't advise it. I'd wait and get an UD pulley after you have a significant amount of mods, that way the gains will be a bit greater.

With an UD pulley, you'll notice that your headlights will dim and strengthen as you sit at idle, which can become quite annoying when sitting in a drive-thru at Wendy's