can you install a roushcharger onto an engine that already has underdrive pulleys and an e-fan?

i was wondering if i am going to have to put the factory pulleys back on. thanks guys.

 

you will have to reinstall the factory pullies... but you can leave the efans

 

you can run the underdrive pulleys because the Roush SC uses a seperate drive system. As long as the replacement harmonic balancer has the three mounting holes should be no problem, if it doesnt you can still run the water pump underdrive pulley. and no problem with the E-fans you just will have to modify the intercooler tank mount.