Hello, I have a 2009 ford mustang gt and I am simply trying to gain power a piece at a time.
My question is, how effective are underdrive pulleys?
I currently have a cold air intake with in hand tuner, 4.10 gears, and aftermarket mufflers… Any information would be greatly appreciated. Thanks
Brandon
Read more: How effective are underdrive pulleys? 2009 Ford Mustang GT?
