Serpentine Belt - so easy a noob can do it

[99 Boxcutter]

What's so good about the underpully?

[Ghostrider 310]

Originally Posted by 99 Boxcutter

What's so good about the underpully?

Harder bilateral pull on the glenoid fossa for minimal dollars spent and a three hours of your time.

[thstone]

Originally Posted by 99 Boxcutter

What's so good about the underpully?

The underdrive pulley turns the engine accessories (power steering, a/c, etc) at a lower speed than the regular size pulley. This reduces the wear on those items and adds back a little bit of power that would otherwise be lost.