It is a resistor. I have installed them in cars. Nothing visibly different except the inline resistor. My 2008 was the first VB mod done by IPT. They had such a hard time figuring out resistor value to trick the ECU that my resistor is outside the VB. It is in the wiring harness on thee side of the tranny. They did not want to go back in and pull the assembly again, lol.
My tranny also blew up on my third pull with OEM fueling and a BNREVO16g. So, whatever they did was useless. Total waste of $1200.
Have installed a few IPT modded VB's since and am very ashamed at what I paid for.