I think It flows way better than the stock lower .When you compare them side by side,,BIG DIFFERENCE!!!!!I actually got a great deal on mine it was advertised as a lower intake for a 302, But did not say for what, As soon as I saw it I went for it bought it for 20 bucks... Plus 6 dollars shipping it came with the fuel lines which You don't need if you put it on your mustang,,But It does fit My systemax top.. so basically I have a spare one , unless I polish it and sell it back on ebay or something...