steeda cat back
i am planning on buying a cat back system for my 2001 v6 mustang. I am interested on the steeda cat back system for $599. Is it true that it will add 20 horsepower. Will it decrease my torque if i only have a mac cold air intake and underdrive pulleys? And how big are the pipes and the the tips. And is this worth doing for over 600 dollars or should i just make another modification to my car. I would really appreciate your help guys. thanks
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