Im trying to find the "inverted" belt roller that the cup cars use but cant find it..
I looked at my neighbours cupcar and it has porsche number 996 115 117 9A and muehleisen.de written on it, cant find anything on porsche parts websites, google or that website either.
There must be someone here that has done this mod? What part did you use?

 

most keep the a/c here cause it cools the fuel also

 

Found it, it was 996 115 015 9A for the pulley
997 102 151 91 for the belt.
The darn pulley is $500

 

I thought EVOmS was making pulleys. Maybe check them or other aftermarket sources.

 

gt3/underdrive pulleys i was aware of, same as BBI havent heard anything about power steering/a/c delete pulleys

 

A little edit on the belt, it does not work with cup belt as the cup has a smaller damper pulley. You need a belt of 1623mm lenght. Trial and error ftw!