Procharger belt question

[Medusa5oh]

Helping someone install the passenger side style mounted procharger on a 2015 Mustang GT that he purchased from someone we knew. I believe the supercharger kit is 1FW411-SCI. (Passenger mount unit using the oem air box) It has the P1X blower upgrade but everything else is spec as included by procharger. The pulley included measured at 3.60 with a digital caliper (which matches the invoice from procharger) and the belt included is a gates K06882.

My question is, is that the right belt? we sliding the factory tensioner as far as possible and no matter what the belt seemed way too short to slide over any of the idlers while being on the grooved pulleys. The belt is routed per the included procharger official instructions as well has having the head unit clocked in the noted orientation. Nothing is bound up or linked anywhere. I’m at a loss!

Worst case I’m calling procharger first thing Monday but there isn’t a ton of info online for this kit, mostly the newer style kit that mounts to the driver side area!

Thank you!!

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[horsepower addiction]

You can ether purchase a longer belt or you can modify the tensioner so it can move farther. You will need a grinder to modify it. If you want to know how let me know. If you buy a longer belt you should either get a green belt or a rpm belt both are from gates