best belt drive for my 2014 supercharged coyote mustang

hi guys i have 2014 mustang gt with ford racing 2.9 whipple rear feed supercharger

now the car is under tuning by LUND racing

everytime when we want to go WOT pull datalogs , the supercharger drive belt cuts out

we run 12-13 boost in the car now

i need a great drive belt can handle this much of boost

my belt size is 6PK2120

i need some help guys please

Wouldnt that be more of an alignment issue with the pullies?

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Reaper14 said:

Wouldnt that be more of an alignment issue with the pullies?

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i will check the pullies but before that i want to buy a new drive belt and i'm
Confused what's the best drive belt for this setup

Im new to all this & I recently installed my whipple as well so I dont know enough to say. But I do hear others talk about Gates heavy duty green belts.

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https://www.svtperformance.com/forums/index.php?threads/1140578/

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I had issues with the Gates green HD belt slipping on my procharger setup. I switched over to the Gates RPM belt and it seems to have fixed the issue. Keep in mind the RPM belt does not stretch so it doesnt need as much tension as a normal belt.

contact Whipple?

I run the same set up. I have the HD green belt and a VMP HD tensioner with no slip at 12 psi and no belt dust