2.9 Whipple + IW 10% ballancer belt question

[ugotbit03]

Guys-

I'm installing a 2.9 Whipple on a 2011 GT500. It has a 3.25 pulley, Metco aux idler and also a IW 10% OD ballancer.

I'm looking for the correct belt size, I searched and got nothing.

The K100852 is a good bit short even without the idler.

Thanks in advance-

ETA- Is it me or does Whipples instructions suck ass?

ETA#2- It's because the instructions are for 07-09.

ETA#3- I found updated color instructions on Ford Racing's site. Helps a lot with the EVAP solenoid that the Whipple instructions mentioned nothing about...

 

[ugotbit03]

For the record, a Napa 100860HD will fit a 3.25 upper, and 10% IW lower. It also worked with a Evo Performance aux idler is the highest position.