Old exhaust on the bottom (duh) Dynomax UltraFlo 2.5 on top. Whole thing from pulling off to installation took only a couple hours...most due to trying to finagle the old exhaust out without cutting it to pieces with the truck on the ground and a band clamp that did not want to compress correctly.

Screamin Demon coil pack, ASP underdrive pulley and throttle body spacer (which was a failed attempt at an idea before it even touched the truck.)

Stock crank pulley weight.

ASP aluminum under drive pulley weight.

It is no wonder Vulcan owners (manual transmission guys namely) feel so much response with the new pulley. Two pounds lighter and almost small enough to fit INSIDE the factory pulley.

Diameter and circumference difference.
Installation took less than an hour. I used a Bando 6PK2195 belt.

The reason why the spacer idea was a failure. I was hoping to use it and just bore the center to 60mm for the Duratec TB. As you can see, that is not going to work. Off to the junkyard for an extra intake then.