I know there are no underdrive pulley sets yet. But i have been thinking about putting these pullies on. The first is the steeda lightweight water pump pulley. And the second is the steeda billett idler and tensioner pulley. Will I see noticeable gains if i were to put these on? Also if a u/d pulley kit comes out will I be able to use that in conjuction with any of these? thanks

Steeda Billet Water Pump Pulley for 2011 Ford Mustang 555-3362

2011 Mustang Steeda Billet Idler And Tensioner Pulley Kit at LRS - Same Day Shipping!

 

Those pullies are more for dress up than performance. The water pump pulley is lighter than the stock one, but that wont make a noticeable performance difference.

 

alright thanks, has there been any word on u/d pullies for the new 5.0?