I would STRONGLY advise against going with aftermarket pulleys. The pulley replaces the harmonic balancer and that's not a good thing. Especially when you consider how little gains you see.
Just get the BMS meth kit and enjoy the ~50whp bump.
"I'm not surprised you get along well with all the other neighbours. If you put fifty children with Down's syndrome in a room there is going to be a lot of hugging." David Thorne