what size belt for FFP UDP

[patgizz]

what length serpentine belt do i need for my Z34 when i put on the FFP underdrive pulley?

[sil]

im not exactly 100 % sure but i think you go 1 inch smaller.
im sure someone here knows
you can allways take your belt to the store and buy a belt thats an inch smaller, try it and take it back if it doesnt fit

[tijuana_no]

i saw somewere is 2" smaller ,i will know for sure latter cause i'll be putting a new belt .