So I have been following this site for a while but rarely post. I am at APR Stage I in a 2013 B8.5 S4 now and want to go to the more Torquey stage. If I purchase the overpriced pulley they provide, can I have my own mechanic install and then take it to the same place and have it flashed to Stage II? Are there any additional charges associated after the pulley purchase to anticipate? Thanks in advance!
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